Math, asked by yashashvimishra, 1 year ago

If seven times the 7th term of an A.P. is equal to eleven times the 11th term, then what will be its 18th term?

Answers

Answered by crystalclear100

16

7(a+6d)=11(a+10d)
-4a=68d
a=-17d
(Putting a's value)
d=1
a18=a+17d
=-17+17
= 0

Answered by sujatha11

8

7(a+6d)=11(a+10d)
-4a=68d
a=-17d
a18=a+17d
Now a18=-17d+17d
So a18=0

sujatha11: If u have difficulty in doing these type of sums

sujatha11: just write down what is given in the form of a and d

yashashvimishra: i hv done up to second step bt cant get what to do next

yashashvimishra: i can do AP's prblms

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