Math, asked by ajinkyaBhagat143, 10 months ago

Find sum of first 9 term in AP 12, 9, 6 ...

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Answered by rounakkumar38

0

Answer:

I hope you will understand in this figure mark me a branliest answer

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Answered by Vishal101100

0

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A = 12

d = 9-12 = -3

n = 9

then

Sn = n/2 (2a+(n-1)d)

Sn = 9/2 (2×12+(9-1)(-3)

Sn = 9/2 (24-24) = 0

Sum of first 9 terms = 0

hope it helps......

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