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by vladmire » Thu Dec 04, 2008 5:44 pm
If X and y are integers and 3^x-4 = 3^y-2, which is y in terms of x?

x-6
x-5
x-2
x+2
x+6

can someone break this down for me
and when I see y in terms of x what should i be thinking?
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by cramya » Thu Dec 04, 2008 5:48 pm
I think when the bases are equal on left hand side and right side like this the exponents that they are raised to are equal.

I am assuming the problem is

3^(x-4) = 3 ^(y-2)

So in this problem

x-4 = y-2

x-4+2 = y

x-2 = y

So y interms of x is x-2

Choose C)
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by niraj_a » Thu Dec 04, 2008 5:51 pm
agree with cramya, i did the same thing.
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