Answers

2015-07-13T20:02:26+05:30
A=3
r=6/3=2
T7 = ar^n-1=3*2^6=3*64=192
T8=ar^n-1=3*2^7=3*128=384
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2015-07-13T20:28:05+05:30
Progression is 3, 6, 12, .......

a=3,\ r= \frac{6}{3}=2 \\ \\a_n=ar^{n-1}\\a_7=3 \times 2^{7-1}=3 \times 2^6=3 \times 64=192\\a_8=3 \times 2^{8-1}=3 \times 2^7=3 \times 128=384
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