2,164 views

2 Answers

5 votes
5 votes
Use lagrange mean value thm

F'(c)=f(b)-f(a)/b-a

F(2)=40

F(1)=15

So there exist point c where derivative is 25
3 votes
3 votes
dy/dx = 10x  + 10

x is in (1,2) i.e. x is NOT 1, NOT 2 but it is inbetween 1 and 2.

Put = 1/2 u will get dy/dx = 25

Related questions

0 votes
0 votes
2 answers
3
worst_engineer asked Jan 30, 2016
507 views
The question is f(x) = | x-1 | + | x+1 | is differentiable at x=1 or not . Now , when x<1 , the first part becomes : -(x-1) , i.e 1-x and why should we not change the sig...
0 votes
0 votes
1 answer
4