Question

Find f(-2) for (x) = 3 . 2^x
O A. -36
O B. -12
O c.1/36

O D. 3/4

Answer 1

`\\ \rm\Rrightarrow f(x)=3.2^x`

• Put -2

`\\ \rm\Rrightarrow f(-2)`

`\\ \rm\Rrightarrow 3.2^(-2)`

`\\ \rm\Rrightarrow 3(1/4)`

`\\ \rm\Rrightarrow 3/4`

Answer 2

`\sf f(x) = 3 \ * \ 2^x`

insert x = -2

`\sf f(-2) = 3 \ * \ 2^(-2)`

`\sf f(-2) = 3 \ * \ (1)/(4)`

`\sf f(-2) = (3)/(4)`

option D. 3/4 will be the correct answer.