Answers

2016-07-15T17:28:12+08:00
1.)s=A1/1-r formula
s=64/1-1/4
s=64/ 3/4
s=64x4/3
s=256/3
2.)s=1/3 /1-1/3
=1/3 / 2/3
=1/3x3/2
=3/6
=1/2
3.)s=-4/1-1/4
=-4 / 3/4
=-4x4/3
=-16/3
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