Question

find the 10th term of an ap if the sum of 3rd and 8th term is 7 and the sum of the 7th and the 14th term is -3​

Answer 1

Answer:

-1

Step-by-step explanation:

Let the first term and common difference be a and d .

given

a+2d + a+7d = 7 &. a+6d + a + 13d=-3

2a + 9d = 7 and 2a + 19 d = -3

subtract equations : -10d = 10 or d = -1

and a = 8

So 10th term will be a+9d = 8 -9 = -1