Answers

2014-05-21T20:13:22+08:00
1.the formula by getting the first term is S=a(r^n-1) /r-1 so direct substitution . the answer is -107/48200
2.this is direct substitution again . so n=3.215
3.direct substitution n=3.31 and the formula by getting the last term isL=ar^n-1 so the last term is 0.35
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