Question

5) which team of
A.P: 2,-1,-4,------is -70
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Answer 1

Answer:

I have not understand the question

Answer 2

Answer:

An=-70

a=2

d=-3

n=?

a(n)=a+(n-1)d

-70=2+(n-1)-3

-72=-3(n-1)

24=n-1

n=25