Question

a=17,an=350,d=9,n=?,sn=?​

Answer 1

HELLO MATE

an=a+(n-1)d

350=17+(n-1)9

9n=350-17+9

9n=342

n=38

for sn

sn=n(a+L)/2

sn=38(17+350)/2

sn=6973

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Answer 2

Answer:

n is equal to 38

and sn is equal to 6973