Math, asked by karan6998, 2 months ago

if 9th term of an a.p is 49 and 17th term of an ap is 105 find sum of first 12 terms

Answers

Answered by himanshigehlot

0

Answer:

d=7

a=-7

Step-by-step explanation:

9 term=49

a+8d=49

17 term=105

a+16d=105

a+16d=105

a+8d=49

=8d=56

d=56/8

=7

a+8d=49

a+8(7)=49

a+56=49

a=49-56

a=-7

hope it may help you

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