Question

which term of Ap 121,117,113,.....is the 1st negative term?

Answer 1

32nd term of this ap is first negative

Answer 2

In the given A.P ;

121,117,113......

a = 121

d = 117-121 = -4

l = 0

l = a+(n-1)d

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

n-1 = 121/4

n = 30.25+1

n = 31.25

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Since the value of n is a decimal number, hence 0 is not the term of given A.P

And after 0 the first negative term will come.

Hence the 32nd is the first negative term

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