8. OR...................
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A.T.Q,
7 times 7th term = 11 times 11th term
7(a+6d)=11(a+10d)
7a+42d=11a+110d
42d-110d=11a-7a
-68d = 4a
a=-17d
18 th term = a + 17d
-17d + 17d
=0
So, 18 th term of A.P = 0
7 times 7th term = 11 times 11th term
7(a+6d)=11(a+10d)
7a+42d=11a+110d
42d-110d=11a-7a
-68d = 4a
a=-17d
18 th term = a + 17d
-17d + 17d
=0
So, 18 th term of A.P = 0
harjotsinghbhinder13:
wrong
a18=a+17d , not a+18d
ooops.. sorry
hmm
i was in hurry
ok, dont worry
hmm.. i hav corrected it.
thank u
welcome
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1
hi,
hope it's helpful,
pls mark IT AS BRAINLIEST!!!!
hope it's helpful,
pls mark IT AS BRAINLIEST!!!!
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