Question

how many terms of AP 2,7,12,17....... add upto 990?​

Answer 1

Step-by-step explanation:

a=2

d=5

n=?

n/2*(2a+(n-1)d))=990

n/2*(4+5n-5)=990

5n²-5n=1980

5n²-5n-1980=0

n²-n-396=0

As the term is in decimal values then no terms of this ap can add up to 990

So kindly check the question again

Hope it helps

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