1.

A=5,d=3,an=50 . find n=_​

Answer»

ANSWER:

An=50

a+(n-1)d=50

5+(n-1)3=50

3n-3=50-5

3n=50+3-5

3n=48

n=48/3

n=16

sn=n/2 (2a+n

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