Question

which term of AP: 121‚117‚113‚. ..‚is it's first term?​

Answer 1

Answer:

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Answer 2

Answer:

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Step-by-step explanation:

Given A.P is 121,117,113...............

a=121 and d=117−121=−4

a

n

=a+(n−1)d

=121+(n−1)(−4)

=121−4n+4

=125−4n

We have find the first term of this A.P.

Therefore a

n

<0

125−4n<0

124<4n

n>

4

125

n>31.25

n=32