TS EAMCET · Maths · Application of Derivatives
If then the minimum value of is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(D)
Step-by-step Solution
Detailed explanation
We know that coshy=ey+e-y2 ...i Let u=ey+e-y2, to find the maximum or minimum value of u, find the points at which dudy=0. We have u=ey+e-y2 ⇒dudy=ey-e-y2 Now dudy=0 ⇒ey-e-y2=0 ⇒ey-1ey=0 ⇒e2y=1 ⇒2y=0 ⇒y=0. Now,…
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