Question

Evaluate x^1-x^-1+x^0 for x=2​

Answer 1

given equation = x¹-x⁻¹+x⁰

lets subtitute the value of x in this equation = 2-1/2+1

= 3-1/2 =5/2 =2.5 (ans)

Hope it helps

Answer 2

5/2

Explanation:

`x^1=x\text{ and }x^(-1)=(1)/(x) \text{ and }x^0 = 1`

These make the expression
`x^1-x^(-1)+x^0=x-(1)/(x)+1` .

Plug in x = 2 to get
`2-(1)/(2)+1=(5)/(2)`