Question

Sum of the first 20 terms of an a.p is -240,and it's first term is 7 find its 24th term

Answer 1

Answer:

the 24th term is 39.

Step-by-step explanation:

GIVEN,

•          S20 = -240

      First term(a) =7

    t24=?

s20 -240

n/2[2a+(n-1)d] = -240

10[14+19d]=-240

14+19d=-24

19d=-24-14

19d=-38

d = -2

t24=a+(n-1)d

      =7+23(-2)

       =7-46  

    t24    = -39

Answer 2

Step-by-step explanation:

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