Question

Y = f(x) = 2^x

Find f(x) when x = -1.
Express as a decimal, rounding to the nearest
thousandth.

Answer 1

The value of f(x) when x=-1 is 0.5

Therefore
`f(-1)=0.5`

Explanation:

Given that y=f(x)=
`2^x`

to find the f(x) when x=-1 :

That is to find f(-1)

Put x=-1 in the given function f(x)=
`2^x`

`f(-1)=2^(-1)`

`=(1)/(2)`

`=0.5`

Therefore
`f(-1)=0.5`

The value of f(x) when x=-1 is 0.5