9th Class Mathematics Sample Paper Mathematics Sample Paper-2

  • question_answer If \[{{7}^{1+x}}+{{7}^{1-x}}=50\], then x is:

    A) \[\underline{+}\]2                      

    B) \[\underline{+}\]3

    C) \[\underline{+}\]1                      

    D) \[\underline{+}\]5

    E) None of these

    Correct Answer: C


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