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quick maths question

hi guys :smile:

i understand the whole concept of letting y = 2^x and that's how i approached the question initially, but i'm a little confused as to how the 2^x+2 becomes 4y.

thanks!

maths q 4.png
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Avatar for TeacherP
TeacherP
9
Original post by ashaxo99
hi guys :smile:

i understand the whole concept of letting y = 2^x and that's how i approached the question initially, but i'm a little confused as to how the 2^x+2 becomes 4y.



2^(x+2) is the same thing as 2^x multiplied by 2^2

4(2^x)

Since we're setting 2^x = y, that's 4y
Reply 2
Avatar for ashaxo99
ashaxo99
OP
15
Original post by TeacherP
2^(x+2) is the same thing as 2^x multiplied by 2^2

4(2^x)

Since we're setting 2^x = y, that's 4y


ahh thank you very much :smile:

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