Discuss the applicability for Rolle’s theorem, when:
, where
Condition (1):
Since, f(x)=(x-1)(2x-3) is a polynomial and we know every polynomial function is continuous for all xϵR.
⇒ f(x)= (x-1)(2x-3) is continuous on [1,3].
Condition (2):
Here, f’(x)= (2x-3)+ 2(x-1) which exist in [1,3].
So, f(x)= (x-1)(2x-3) is differentiable on (1,3).
Condition (3):
Here, f(1)= (1-1)(2(1)-3)=0
And f(5)= (3-1)(2(3)-3)=6
i.e. f(1)≠f(3)
Condition (3) of Rolle’s theorem is not satisfied.
So, Rolle’s theorem is not applicable.