Algebra Freakout

Nov 09, 2005 00:16

So, using the formula for the sum of a geometric series, says my book ( Read more... )

math

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Comments 5

dxmachina November 9 2005, 12:42:19 UTC
What? Why? What happened? You can't just put an equals sign there, where'd the (m/n-1) go? What happened to the denominator? Will no one think of the children? WHY GOD WHY?!?!?!

Intelligent design?

All I remember is FOIL, which I'm not sure applies here. Also, I think there's some ambiguity in what you've typed. Are the "((m/n)-1)" and "p/(x^(k-1))" terms in the numerator or the denominator?

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em_angharad November 9 2005, 15:11:00 UTC
Numerator. What, my parentheses aren't totally clear? Silly. I would have tried to do it as more comprehensible fractions (on more than one line), but I think lj probably interprets multiple spaces as just one.

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anonymous November 9 2005, 15:12:30 UTC
See, this isn't all that hard -- I think they do infinite series in pre-calc, and this may just even be algebra, but it's one of those places where they've skipped a step in the explanation because it seems totally clear to them, and suddenly I'm lost.

Regardless, I'm totally feeling for your mother.

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em_angharad November 9 2005, 15:13:34 UTC
...says Emily. Really thought I was logged in already.

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mearagrrl November 9 2005, 15:12:59 UTC
I think I learned about infinite sums in "Math Topics" (aka "you took calculus junior year of hs and want MORE math?")

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