Question
If 11 times the 11th term of an A.P. is equal to 7 times
its 7th term, then its 18th term will beSolution
We are given: 11 times the 11th term = 7 times the 7th term in an A.P. Use the formula for the nth term of an A.P. 
So, 11th term = a+10d 7th term = a+6d Given Condition – 
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