Question

if 7^(-x)=2 then what is 7^(3x)?

Answer 1

first lets find the value of 7^x
a^{-b} = 1/a^b
so,
7^{-x} = 1/7^x =2
so, 7^x =...?

Answer 2

2/7?

Answer 3

where did 7 come from ?
1/7^x = 2
so, 7^x = 1/2
got this ?

Answer 4

ohhok ! yes got it

Answer 5

so then how would we get 7 to 3x?

Answer 6

now 7^(3x) = \((7^x)^3=.... ?\)

Answer 7

would it be 1/2 to 3?

Answer 8

1/8?

Answer 9

thats absolutely correct!
good :)

Answer 10

thank you so much:)

Answer 11

welcome so much:)