Math, asked by dhesiamarjotsingh, 5 days ago

For an A.P. first and last term are 17 and -38. If sum of the A.P. is -105, find the number of terms in A.P

Answers

Answered by kaRthiKsoni

3

Answer:

A1 = 17

an ( last term ) = -38

sn= n/2(a+an)

-105=n/2(17-38)

Step-by-step explanation:

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