Think positive not negative

Algebra Level 3

Which term of the AP: 121, 117, 113, ...... is its first negative term?


The answer is 32.

Manish Mayank by Manish Mayank , 20, India

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3 solutions

Anurag Spartan
Jun 21, 2014

121- 4 (n-1) <0 ( nth term of series should be less than 0) n > 121/4 + 1 n > 31.25 nearest integer 32!!!

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Uahbid Dey
Jun 17, 2014

121-4(n-1)=0 =>n=31.25<32 try n=32

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Awesome dude.....but from where did u got this ideas....

Akshay Patel - 6 years, 11 months ago
Patil See
Jun 13, 2014

121-(n-1)4 = -3 . solving for n gives n=32

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