Question

the sum of the 4th and 8th terms of AP is 24 and the sum of 6th and the 10th terms is 44. find the sum of the first 10 terms of the AP.​

Answer 1

Answer:

sum of first 10 terms =95

Step-by-step explanation:

eqn1 => 2a+10d=24

eqn2=> 2a+14d=44

solving both eqn 1 and 2 gives a= -13 and d=5

so sum of first 10 terms =95

sum formula= n/2{2a+(n-1)d}