one of the questions says that, given that 2^x=y express 4^x in terms of y in the ms it says that the answer is y^2 but I don't understand how to get there can someone help please?
one of the questions says that, given that 2^x=y express 4^x in terms of y in the ms it says that the answer is y^2 but I don't understand how to get there can someone help please?
You know that 4 = 2^2 So 4^x can be written as (2^2)^x So then you just multiply out the powers to get 2^2x Which is the same as (2^x)^2, so if y=2^x, 4^x = y^2
You know that 4 = 2^2 So 4^x can be written as (2^2)^x So then you just multiply out the powers to get 2^2x Which is the same as (2^x)^2, so if y=2^x, 4^x = y^2
ahh thank you, I completely forgot about doing it that way!!