Verify L.M.V.T. for the function f (x) = x (x+ 4)², x ∈ [0,4]
Answers
Answered by
1
We have , f(x) = (x+1)/x where , x ε [1, 3] .
(1) f(x) is a polynomial function , hence continuous in the interval [1, 3] .
(2) f(x) is a polynomial function , hence differentiable in the interval (1, 3) .
(3) f(1) = 1+1/1=2 , f(3) =3+1/3=4/3 .
Also , f’(x) = 1/x-(x+1)/x^2=-1/x^2
f'(c)=-1/c^2
Now , f’(c) = [f(b) – f(a)]/(b – a)
Or , -1/c^2= [f(3) – f(1)]/(3 – 1) = (4/3 – 2)/(2) = (-2/3)/2 = -1/3
Or , -1/c^2= -1/3 => c^ = 3,c=root3 ε (1, 3) .
Hence , Lagrange’s mean value theorem is verified.
Answered by
3
first putting 0 in question
0 (0+4)^
= 4^
=16
now,
putting 4 in question
4 (4+4)^
=4 (8)^
= 4 (64)
=68
0 (0+4)^
= 4^
=16
now,
putting 4 in question
4 (4+4)^
=4 (8)^
= 4 (64)
=68
Similar questions