f(x) = x^3 - 5x^2 - 3x
find the mean value theorem to find all numbers c in the interval (1,3)
i got the answer 5 +- (sqrt 16) / 3
am i correct
What is "all numbers c in the interval (1,3)"??
And no, you cannot be correct, whatever c is, since both numbers $\displaystyle 5\pm \frac{\sqrt{16}}{3}=5\pm \frac{4}{3}$ are not in (1,3)...even if the numbers were $\displaystyle \frac{5\pm 4}{3}$ they still aren't in the interval (1,3).
Tonio