Question

Solve.
1/2^x = 1/(x+2)

Answer 1

cross multiply
x+2 = 2^x
x = 2

Answer 2

how did you get from x + 2 = 2^x to x = 2?

Answer 3

think about it, what exponent does x need to be to make it work in that equation. Only 2 works :)

Answer 4

is there some mathematical way to prove that so you dont lose marks for communication. Canadian problems --.-

Answer 5

not with algebra, graphing yes

Answer 6

oh ok thanks man :)