HSC Mathematics

for some, it may be fun...

Wednesday, September 15, 2010

Slow and steady wins the race

Question:

If $2^{x} = 5^{y} = 10^{z}$ , show that $z = \frac{xy}{x + y}$ .

Posted by 행복한 사람 at 5:22 PM 0 comments

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Labels: algebra, arithmetic

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