Multiple Choice Question (MCQ)

For what value of x is the equation 2^{2x + 7}=2^{15} true?

  1. ×

    3

  2. ✓

    4

  3. ×

    7

  4. ×

    5

Collected in the board: Calculate algebraic expressions

Steven Zheng posted 3 years ago

Answer

  1. \because 2^{2x+7}=2^{15}

    \therefore 2x+7=15

    Solving the linear equation gives

    x= 4

    B is correct choice

Steven Zheng posted 2 years ago

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