Question

Evaluate x^1 - x^-1 + x^0 for x = 2.

0

1/2

1 1/2

2 1/2

Answer 1

The answer is 2.5
Evaluate x^1 - x^-1 + x^0 for x = 2
Substitute 2 in for all of the x's.
2^1 - 1/2 - 2^0
2 - (1/2) + 1
2 1/2