Math, asked by macherlapadmapriya, 4 months ago

If 7 times the 7th term of an A.P. is equal to 11times its 11th term, show

that its 18th term is zero.

Answers

Answered by nikhilpachar99

0

Given

7(a+6d)=11(a+10d)

7a+42d=11a+110d

42d-110d=11a-7a

-68d=4a

4a+68d=0

or

a+17d=0 = 18th term

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