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| Topic | Ok, I am failing at this math question and it is driving me insane |
| mastermix3000 09/05/18 12:11:06 PM #1: | Solve for A: S={A-A*R^N}/1-R 1) Multiply both sides by (1-R) ==> S(1-R) = A-A*R^N 2) Divide both sides by R^N ==> [S(1-R)]/R^N = A-A 3) Distribute... I get (S-Sr)/R^N=A-A but apparently the answer is A=(S-Sr)/(1-R^N) where'd that 1 come from/what number concept am I missing D: --- ... Copied to Clipboard! |
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