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by resilient » Thu Feb 07, 2008 6:12 pm
What is the smallest integer n for which 25^n>5^12?

a.6
b.7
c,8
d.9
e.10
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qa

by resilient » Thu Feb 07, 2008 6:13 pm
qa is b
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by luvaduva » Fri Feb 08, 2008 11:31 pm
Use the following formula:

(a^x)^y = a^(x*y)

Plugging in we have:

(5^2)^6 = 5^(2*6)

When n = 6 both sides are equal.

Thus when n = 7 the left side is greater than the right.

=)
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ok

by resilient » Sun Feb 10, 2008 10:25 pm
i think i am getting the hang of this and honing in on my. I think I forgot to get a same common base so that all sides can communicate and interact. This then makes everything much easier. True? am i on right track!?
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