Question

29. The sum of the 4th and the 8th term of an AP is 24 and the sum of its 6th and 20th terms is
44. Find S10
​

Answer 1

Answer:

10

Step-by-step explanation:

a4+a8=24

a+3d+a+7d=24

2a+10d=24. .........1

a6+a10=34

a+5d+a+9d=34

2a+14d=34. .,.......2

Subtracting 2 from 1

2a+14d=34

2a+10d=24

- - -

4d=10

d=4/10or 2/5

Put d= 2/5 in 1

2a+10×2/5=24

2a+4=24

2a=24-4

2a=20

a=10

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