The sum of the 3rd and 7th terms of an A.P. is 38, and the 9th term is 37. Find the A.P.

Mathematics

1 answer:

ElenaW [278]3 years ago

4 0

Answer:

The AP is 1, 11/2, 10, 29/2, 19, ....

Step-by-step explanation:

Let the first term be a and d be the common difference of the arithmetic progression.

ATQ, a+2d+a+6d=38, 2a+8d=38 and a+8d=37. Solving this, we will get a=1 and d=9/2. The AP is 1, 11/2, 10, 29/2, 19, ....

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