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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