Question

Solve please 2^(x) = 1/4

Answer 1

\[2^{x}=0.25\]

Answer 2

\[\log_{2} 2^{x}=\log_{2} 0.25\]

Answer 3

\[x=\log_{2} 0.25\]

Answer 4

What is the value?

Answer 5

im not sure
do you have a calculator with you? because i dont

Answer 6

you don't need a calculator for this

Answer 7

oh right
-2

Answer 8

silly me

Answer 9

try and express 1/4 as a power of 2

Answer 10

:P

Answer 11

but i am leading her through...?

Answer 12

@Lorena.isabel can you express 1/4 as a power of 2, i.e.:\[\frac{1}{4}=2^?\]

Answer 13

ahhh....i see

Answer 14

good moderator you are

Answer 15

thank you :)

Answer 16

so the work above isn't enough?

Answer 17

Whats the method?

Answer 18

the very top

Answer 19

lorena do you know what happens when you raise a number by a negative number?

Answer 20

Oh i get it thanks

Answer 21

so what answer do you get for:\[\frac{1}{4}=2^?\]what should the ? be replaced by?

Answer 22

-2

Answer 23

good, so now you know you can express:\[2^x=\frac{1}{4}\]as:\[2^x=2^{-2}\]and the solution should become apparent.

Answer 24

Yeah thanks!

Answer 25

yw :)