Math, asked by rehmanislammul8092, 2 months ago

Find the sum of the given ap 3 9 15 99,where the number of terms is 1u

Answers

Answered by henryjames31999

0

Answer:

867

Step-by-step explanation:

first find the number of terms (n)

then use short cut formula of Sn = (n/2)(first term+last term)

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