Question

Which term of an app: 121,117,113.......... Is its first negative term.

Answer 1

Answer:

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Answer 2

a=121, d=-4, let an=0

$a_{n} = a + ( n- 1)d$

0=121+(n-1)(-4)

-121=-4n+4

-125=-4n

n=31.25

since n has to be a whole no., therefore, the Answer is 32 ( the no. next to 31.25)

hence the 32nd term is the first negative term