Answer Posted / baburammca

8+8(.5)*2+8(.5)^2*2+8(.5)^3*2...
8+2(8(.5)+8(.5)^2+8(.5)^3...)
Infinity= u1/1-r
u1=8(.5). r=.5
8+2(8(.5)/1-5)
8+2*8
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