Question

12th of ap is -13 and first 4 terms is 24 find 10 terms

Answer 1

Answer:

a+11d = -13..........(1)

Let first four terms be a-d, a ,a+d ,a+2d

a-d+a+a+d+a+2d = 24

4a+2d = 24.........(2)

Multiple(1) by 4

4a+2d = 24

Hence -42d= 76

d=38/21

Hence for 10th term ,

a +9d =