AP EAMCET · Maths · Application of Derivatives

If $p$ and $q$ are respectively the global maximum and global minimum of the function $f (x) = x^{2} e^{2 x}$ on the interval $[- 2, 2]$ , then $p e^{- 4} + q e^{4} =$

A $0$
B $4 e^{8}$
C $4$
D $4 e^{8} + 1$

Verified Solution

Answer & Solution

Correct Answer

(C) $4$

Step-by-step Solution

Detailed explanation

It is given that, f(x)=x2e2x Differentiating the above equation we get, f'(x)=2e2xx2+2xe2x ⇒0=2e2xx2+x ⇒x2+x=0 ⇒x=0, -1 The maxima and minima is obtained at -2, -1, 0, 2 as the function bound. Thus, f(-2)=(-2)2e-4=4e-4 f(-1)=(1)2e-2 f(0)=0…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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If p and q are respectively the global maximum and global minimum of the function f(x)=x2e2x on the interval [-2,2], then pe-4+qe4=

Step-by-step Solution

If $p$ and $q$ are respectively the global maximum and global minimum of the function $f (x) = x^{2} e^{2 x}$ on the interval $[- 2, 2]$ , then $p e^{- 4} + q e^{4} =$