Question

If Sn=1023 for a G. P whose a=1 & r=2 , find n ? ​

Answer 1

Answer:

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Step-by-step explanation:

Answer 2

Answer:

10

Step-by-step explanation:

sn = a(r^n -1) / r-1

=1×(2^n -1)/ 1

1023 = 2^n -1

1024 = 2^n - 1

2^10 = 2^n -1

n =10