The Additive Inverse of S,

Where S=1-2+3-4+5-6+7-8+ ……….+49-50, is

  1. -25
  2. 1
  3. 0
  4. 25
Monis Rasool Professor Asked on 20th September 2015 in Maths.
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1 Answer(s)

Answer; (4) 25

Explanation:-
S = 1 – 2 + 3 – 4 + 5 – 6 + 7 – 8 + ……………… + 49 – 50
If 1 – 2 + 3 – 4 = – 3
and 1 – 2 + 3 – 4 + 5 = 3
Similarly,
1 – 2 + 3 – 4 + 5 – 6 + 7 – 8 ……………. + 49 – 50 = – 25
Then, S = – 25

Then, the addictive inverse of S( – 25 )= 25

Hence, the answer is (4) 25.

Anurag Mishra Professor Answered on 20th September 2015.
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