1. given a = 5 , d = 3 , An = 50 , find n and Sn
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Answered by
2
Answer:
what is the formula to find SN?
Sn =a(1 − rn) 1 − r .
Answered by
1
Answer:
sn=a+(n-1)d
=5+(n-1)3
=3n+2
3n=48
n=16
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