Question

The function f(x)=2x^3+x-5 has exactly one real zero. It is between:
-2 and -1
-1 and 0
0 and 1
1 and 2
2 and 3

Answer 1

plugin the boundary values,
if zero exists withing the interval : u should get different sings for f(x)

Answer 2

to check if the zero lies between -2 and -1, calculate below first :-
f(-2) = ?
f(-1) = ?

Answer 3

An easier way to do that instead of using a calculator is using Excel or Open Office Calc.

Answer 4

have you got your answer

Answer 5

Did you get between 1 and 2 @cuzthisisafrica