Asked by Abraham

The third term of an A.P is 10times more than the second term. Find the sum of the eight and fifteen term of the A.P if the seventh term is seven times the first term
Answered by Steve
a+2d = 10(a+d)
a+6d = 7a

Solve for a and d, and then you can find the sum of

T8+T15 = (a+7d)+(a+14d)
Answered by hjkjh
If the second term of an arithmetic sequence is -2 and the fourth term is 6, find the seventh term.
Answered by Anonymous
The third term of an ap is 18 and seveententh term is 30 find the sum of 17 term
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