Question

AP 21,18,15.... का कोन सा पद -81 है
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Answer 1

Answer:

a = 21

d = 18 - 21 = -3

t = -81

t = a+(n-1)d

-81 = 21 + (n-1)-3

-102 = -3(n-1)

34 = n - 1

n = 35

Hope it helps you!!