- #1
Zerobu
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Homework Statement
Find a number in the closed interval [1/2, 3/2] such that the sum of the number and its reciprocal is
(a)as small as possible
(b) as large as possible
I am given the answer in the back of the book
The answer to a is 1
The answer to be is 1/2
Homework Equations
Here is my equation
S= x + 1/x
dS/dx = 1-1/x^2
The Attempt at a Solution
I was wondering if i should set the derivative equal to zero and find the zeroes for the derivatives?