Question

the sum of 4th and 8th term of an ap is 24 and the sum of 6th and 10th term is 34 find the first tearm and common difference​

Answer 1

Answer:Sum of the 4th and the 8th terms

= a+3d+a+7d = 2a+10d = 24, or

a + 5d = 12, or

a = 12–5d …(1)

Sum of the 6th and the 10th terms

a+5d+a+9d = 34, or

2a+14d = 34, or

a+7d = 17, or

a = 17–7d …(2)

Equate (1) and (2)

12–5d = 17–7d, or

7d-5d = 17–12, or

2d = 5, or

d = 2.5

So a = 17–7*2.5 = -0.5

Step-by-step explanation:  hope it helps