Math, asked by maxsarthak3, 9 months ago

find AP of 15 terms

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Answered by seemargawai

0

hence ap is 97.91,96.56,95.21........

Answered by sunitazirange

0

Answer:

last term = 9-5n

a+ (n-1)d = 9-5n

a+ nd - d = 9-5 n

a - d = 9 and nd = -5n⇔ d = -5

a - (-5) = 9 ⇔ a = 4

l = 9-5(15) = 9-75 = -66

sum = N/2 (a+ l) = 15/2 (4-66) = -31*15 = -465

hope it helps!

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