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7th Class Mathematics Integers Question Bank Number System and Operations

  • question_answer
    If A = \[{{\left( -\text{ }1 \right)}^{1}}+{{\left( -\text{ }1 \right)}^{2}}+{{\left( -\text{ }1 \right)}^{3}}+\_\_\_\_\_\_+{{\left( -\text{ }1 \right)}^{1001}}\] and B = \[{{\left( -\text{ }1 \right)}^{1}}-{{\left( -\text{ }1 \right)}^{2}}+{{\left( -\text{ }1 \right)}^{3}}-{{\left( -\text{ }1 \right)}^{4}}+\_\_\_\_\_\_+{{\left( -\text{ }1 \right)}^{1001}},\text{ }\] then find A - B.

    A) -1002

    B)  1000

    C) -1001

    D)  1001

    E) None of these

    Correct Answer: B

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