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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-13

  • question_answer
    If \[{{3}^{x}}\times {{27}^{x}}={{9}^{x+4}},\] then what is the value x?

    A) 4        

    B) 5

    C) 6                                 

    D) 7

    Correct Answer: A

    Solution :

    \[{{3}^{x}}\times {{27}^{x}}={{9}^{x+4}}\] \[{{3}^{x}}\times {{3}^{3x}}={{3}^{2(x+4)}}\Rightarrow 4x=2x+8;\,\,\]                          


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