Question

If 8 times the eight term of an A.P. is equal to 7 times its seventh term, then what is its 15th term?

Answer 1

Step-by-step explanation:

an=a+(n-1)d

a8=a+7d

a7=a+6d

According to question

8[a+7d]=7[a+6d]

8a+56d=7a+42d

a=-14d

Substitute abd u will get the answer

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Answer 2

Hope u understand this answer.