JEE Main & Advanced Sample Paper JEE Main Sample Paper-9

  • question_answer
    Statement-1: If \[{{x}^{2}}+px+q\] is an integer for every odd integral value of x, then p & q are necessarily odd integers.
    Statement-2: Sum of two odd integers is an even integer

    A)  Statement -1 is true, statement -2 is true and statement-2 is correct explanation for statement -1.

    B)  Statement -1 is true, statement -2 is true and Statement-2 is NOT correct explanation for statement -1.

    C)  Statement-1 is true, Statement-2 is false

    D)  Statement-1 is false, statement -2 is true

    Correct Answer: D

    Solution :

    Let \[f(x)={{x}^{2}}+px+q\] Let\[p=q=\frac{k}{2};k\in l\] \[\therefore \]\[f(x)={{x}^{2}}+\frac{k}{2}(x+1)=\]integer for every odd value of x so it is not necessary that p & q are odd integers.


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