Verify that the function satisfies the three hypotheses of Rolle’s Theorem on th

York

York

Answered question

2021-09-12

Verify that the function satisfies the three hypotheses of Rolle’s Theorem on the given interval. Then find all numbers c that satisfy the conclusion of Rolle’s Theorem. f(x)=512x+3x2, [1,3]

Answer & Explanation

Malena

Malena

Skilled2021-09-13Added 83 answers

Rolle's Theorem says that is a number c in (a,b) such that f(c)=0 if f satisfies the following hypotheses:
Because given function is a classical polynomial functions, the first two hypotheses are naturally satisfied. Now we'll check the third hypotheses:
f(x)=512x+3x2
f(a)=f(1)=5121+312=4
f(b)=f(3)=5123332=4
Because f(1)=f(3) is satisfied, the third hypothesis is also satisfied. Hence Rolle's theorem is applicable on given interval. To find all numbers c that satisfy the conclusion of Rolle's theorem, we'll differentiate our function:
f(x)=512x+3x2
f(x)=5(12x)+(3x2)
=0121+23x
=12+6x
Now we'll find the value of c:
f(c)=0
12+6c=0
6c=12
c=2
Result: c=2

Do you have a similar question?

Recalculate according to your conditions!

Ask your question.
Get an expert answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?