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  3. 10th Class
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10th Class Mathematics Sample Paper Mathematics Sample Paper-6

  • question_answer
    If\[{{\mathbf{2}}^{x+\mathbf{1}}}+{{\mathbf{2}}^{\mathbf{2}x}}=\mathbf{4}-{{\mathbf{2}}^{x}}\], then find the value of\[\mathbf{3x}\].

    A) 0

    B)                               1

    C) 3                          

    D)     4

    E) None of these

    Correct Answer: A

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