Question Details

If y = aeˣ+ be⁻ˣ + c Where a, b, c are parameters, they y’ is equal to

Options

A

aeˣ – be⁻ˣ

B

aeˣ + be⁻ˣ

C

-(aeˣ + be⁻ˣ)

D

aeˣ – beˣ

Correct Answer :

aeˣ – be⁻ˣ

Solution :

The correct option is aex – be–x.

To find the first derivative of the given function, let us start with the equation:
y = a e x + b e x + c
where a, b, and c are constant parameters.

We differentiate both sides with respect to x to find y' (or dy/dx):
y = d d x ( a e x + b e x + c )

Using the sum rule of differentiation, we can differentiate each term individually:
y = d d x ( a e x ) + d d x ( b e x ) + d d x ( c )

Now, let us evaluate the derivative of each term:
1. For the first term, a is a constant coefficient, and the derivative of ex with respect to x is ex:
d d x ( a e x ) = a e x
2. For the second term, b is a constant coefficient. Applying the chain rule to e–x, we get:
d d x ( b e x ) = b ( e x d d x ( x ) ) = b ( e x ) = b e x
3. For the third term, c is a constant parameter, and the derivative of any constant is 0:
d d x ( c ) = 0

Combining all the terms back together, we get:
y = a e x b e x

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