Question

Find the derivative of f(x) = 4 divided by x at x = 2.

Answer 1

f(x)=(4/x)
f"(x)=-4/(x^2) now put x=2 and tell me the answer.

Answer 2

1

Answer 3

no try again

Answer 4

-4/(2^2)=-4/4=-1

Answer 5

i hope it is clear ?

Answer 6

How did it became negative?

Answer 7

-4

Answer 8

see derivative of 1/x=(-1/x^2)
this is the property of differentiation.