dy/dx - = 1 - y,y(0) = 0 is an example of

[zaasmi]

@zaasmi said in MTH603 Mid Term Past and Current Solved Paper Discussion:

The predictor-corrector method an implicit method. (multi-step methods)
True
False

False

Explanation:

• Predictor-Corrector Methods: These are a type of multi-step methods used for solving ordinary differential equations. They involve predicting the solution at a future point using an explicit method and then correcting it using an implicit method or vice versa.

• Implicit vs. Explicit: Predictor-corrector methods are not exclusively implicit. The predictor step is usually explicit, while the corrector step can be either implicit or explicit, depending on the specific method used.

Therefore, the statement that the predictor-corrector method is an implicit method is:

False

[zaasmi]

Generally, Adams methods are superior if output at many points is needed.
True
False

[zaasmi]

@zaasmi said in MTH603 Mid Term Past and Current Solved Paper Discussion:

Generally, Adams methods are superior if output at many points is needed.
True
False

True

Explanation:

• Adams Methods: These are multi-step methods for solving ordinary differential equations. Adams-Bashforth (explicit) and Adams-Moulton (implicit) methods are designed to use information from previous steps to provide higher accuracy.

• Efficiency: Adams methods can be more efficient when many output points are needed because they leverage information from multiple previous points to compute each new point. This can reduce the overall computational effort compared to methods that recalculate at each step without using past information.

• Performance: The performance of Adams methods improves with the number of points because they use past computed values effectively, which makes them advantageous for solving problems over many intervals.

Thus, Adams methods are generally superior when many output points are required.

So, the statement is:

True

[zaasmi]

The Trapezoidal rule is a numerical method that approximates the value of a.______________.
Indefinite integral
Definiteintegral
Improper integral
Function

[zaasmi]

@zaasmi said in MTH603 Mid Term Past and Current Solved Paper Discussion:

The Trapezoidal rule is a numerical method that approximates the value of a.______________.
Indefinite integral
Definiteintegral
Improper integral
Function

Definite integral

Explanation:

• Trapezoidal Rule: This numerical method approximates the value of a definite integral. It works by dividing the area under a curve into trapezoids and summing their areas to estimate the total integral.

• Indefinite Integral: This represents a family of functions and is not computed using numerical methods like the trapezoidal rule.

• Improper Integral: This type of integral involves infinite limits or unbounded integrands, and while numerical methods can be adapted for improper integrals, the trapezoidal rule itself is typically used for definite integrals.

• Function: This is a broader concept and not directly related to the specific numerical approximation provided by the trapezoidal rule.

Thus, the trapezoidal rule specifically approximates the value of a definite integral.

So, the correct option is:

Definite integral

[zaasmi]

The need of numerical integration arises for evaluating the definite integral of a function that has no explicit ____________ or whose anti derivative is not easy to obtain.

Antiderivative
Derivatives.

[zaasmi]

@zaasmi said in MTH603 Mid Term Past and Current Solved Paper Discussion:

The need of numerical integration arises for evaluating the definite integral of a function that has no explicit ____________ or whose anti derivative is not easy to obtain.

Antiderivative
Derivatives.

Antiderivative

Explanation:

• Numerical Integration: This technique is used to approximate the definite integral of a function, especially when an explicit antiderivative is difficult or impossible to obtain.

• Antiderivative: The antiderivative (or indefinite integral) of a function is the function whose derivative is the original function. When an antiderivative is not easily obtainable, numerical integration methods are used to estimate the definite integral.

• Derivatives: While derivatives are important in calculus, the issue with finding an explicit antiderivative relates directly to the challenge of evaluating definite integrals.

Thus, the need for numerical integration arises when the antiderivative is not easy to obtain.

So, the correct option is:

Antiderivative

[zaasmi]

An indefinite integral may _________ in the sense that the limit defining it may not exist.

Diverge
Converge

[zaasmi]

@zaasmi said in MTH603 Mid Term Past and Current Solved Paper Discussion:

An indefinite integral may _________ in the sense that the limit defining it may not exist.

Diverge
Converge

Diverge

Explanation:

• Indefinite Integral: This represents a family of functions whose derivatives are the integrand. While the concept of convergence and divergence more commonly applies to definite integrals, the idea of divergence can apply to indefinite integrals in the context of improper integrals or when dealing with limits.

• Diverge: An integral (definite or indefinite) is said to diverge if it does not converge to a finite value. In the context of indefinite integrals, divergence can occur if the integral involves terms or functions that lead to an unbounded result.

Thus, an indefinite integral may diverge if the limits involved lead to an unbounded or non-existent result.

So, the correct option is:

Diverge

[zaasmi]

An improper integral is the limit of a definite integral as an endpoint of the interval
of integration approaches either a specified real number or ∞ or -∞ or, in some cases, as both endpoints approach limits.

TRUE
FALSE

[zaasmi]

@zaasmi said in MTH603 Mid Term Past and Current Solved Paper Discussion:

An improper integral is the limit of a definite integral as an endpoint of the interval
of integration approaches either a specified real number or ∞ or -∞ or, in some cases, as both endpoints approach limits.

TRUE
FALSE

True

Explanation:

• Improper Integral: An improper integral is a type of integral where one or both of the limits of integration are infinite, or where the integrand has an infinite discontinuity within the interval of integration.

• Definition: Specifically, an improper integral can be defined as the limit of a definite integral where the endpoints of the integration interval approach either a finite value or infinity (∞ or -∞), or as both endpoints approach specific limits.

Therefore, the statement accurately describes the concept of an improper integral.

So, the statement is:

True

[zaasmi]

Euler’s Method numerically computes the approximate derivative of a function.

TRUE
FALSE

[zaasmi]

@zaasmi said in MTH603 Mid Term Past and Current Solved Paper Discussion:

Euler’s Method numerically computes the approximate derivative of a function.

TRUE
FALSE

False

Explanation:

• Euler’s Method: This is a numerical technique for solving ordinary differential equations (ODEs) by approximating the solution at discrete points. It does not compute the derivative directly but instead uses the derivative to update the solution iteratively.

• Derivative Computation: Euler’s Method uses the derivative provided by the differential equation to estimate the next value in the solution. It does not numerically compute or approximate the derivative itself.

Thus, Euler’s Method is used to approximate solutions of differential equations, not to compute the derivative of a function.

So, the statement is:

False

[zaasmi]

Euler’s Method numerically computes the approximate ________ of a function.

Antiderivative
Derivative
Error
Value

[zaasmi]

@zaasmi said in MTH603 Mid Term Past and Current Solved Paper Discussion:

Euler’s Method numerically computes the approximate ________ of a function.

Antiderivative
Derivative
Error
Value

Value

Explanation:

• Euler’s Method: This numerical technique is used to approximate the solution of an ordinary differential equation by iteratively computing approximate values of the function at discrete points.

• Approximate Value: Euler’s Method estimates the function’s value at successive points based on its derivative, rather than computing the derivative or antiderivative directly.

So, the correct option is:

Value

[zaasmi]

If we wanted to find the value of a definite integral with an infinite limit, we can instead replace the infinite limit with a variable, and then take the limit as this variable goes to _________.

Chose the correct option :
Constant
Finite
Infinity Click here for detail
Zero