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  • Find the number of terms in sequence 4,2,0,..........., -120.Option: 1 61Option: 2 19</

Find the number of terms in sequence 4,2,0,..........., -120.

Option: 1

61


Option: 2

19


Option: 3

63


Option: 4

64


Answers (1)

best_answer

Clearly the given sequence is an A.P.

a =4, d =-2

Last term = -120

Let -120 be nth term

So, a_n = a+(n-1)d

\Rightarrow -120 = 4 +(n-1)(-2)

\Rightarrow (n-1)(-2)=-124

\Rightarrow (n-1)=62

\Rightarrow n=63

Posted by

shivangi.bhatnagar

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