Question

please answer this question ​

Answer 1

Answer:

95

Step-by-step explanation:

Let the first term be 'a' and common difference be 'd'. According to question:

=> 4th term + 8th term = 24

=> (a + 3d) + (a + 7d) = 24

=> 2a + 10d = 24

=> 2a = 24 - 10d ... (1)

Moreover, 6th + 10th term = 44

=> (a + 5d) + (a + 9d) = 44

=> 2a + 14d = 44

From (1),

=> 24 - 10d + 14d = 44

=> 4d = 20

=> d = 5,

Henceforth, a = - 13

Using S = (n/2) {2a + (n - 1)d} for n =10,

=> (10/2) {2(-13) + (10 - 1)5}

=> 5{-26 + 45}

=> 95