Math, asked by jahangirahmadjahangi, 9 months ago

(vi) given a = 2, d=8, S. = 90, find n and a
n
n

Answers

Answered by krsahusunil996

1

Answer:

n = 12

Step-by-step explanation:

Sn = a+(n-1)d

90 = 2+(n-1)8

88/8 = (n-1)

11+1 = n

n= 12

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