Find the nth and the 15th term of the series 1-1/2+1/4-1/8...(G.P)
chirag8874695183:
Sry. I m from Cbse board I don't know gp but I know ap
doesn't matter...
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Answered by
8
Given GP series 1,-1/2,1/4,-1/8
a=1 r=-1/2/1=1/2
nth termof GP=ar to the power n-1
nth term=1×(1/2)power n-1
15th term=ar power14
=1×(1/2)power14
a=1 r=-1/2/1=1/2
nth termof GP=ar to the power n-1
nth term=1×(1/2)power n-1
15th term=ar power14
=1×(1/2)power14
ans: a15 is 2 to the power -14
Answered by
6
Answer:
Step-by-step explanation:
Given GP series 1,-1/2,1/4,-1/8
a=1 r=-1/2/1=1/2
nth termof GP=ar to the power n-1
nth term=1×(1/2)power n-1
15th term=ar power14
=1×(1/2)power14
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