Giải giúp mik 2 câu này vs

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Giải giúp mik 2 câu này vs
giai-giup-mik-2-cau-nay-vs

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Khánh Gia 4 years 2020-10-15T11:08:27+00:00 1 Answers 96 views 0

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  1. Euphemia
    0
    2020-10-15T11:09:55+00:00
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    Đáp án:

    $\begin{array}{l}
    f)\left( {{8^{14}}:{4^{17}}} \right):\left( {{{16}^6}:{8^2}} \right)\\
     = \left( {{2^{3.14}}:{2^{2.17}}} \right):\left( {{2^{4.6}}:{2^{3.2}}} \right)\\
     = {2^{42 – 34}}:{2^{24 – 6}}\\
     = {2^8}:{2^{18}}\\
     = {2^{8 – 18}}\\
     = {2^{ – 10}}\\
     = \dfrac{1}{{{2^{10}}}}\\
    d){2^3} + 3.{\left( {\dfrac{1}{3}} \right)^0} – {2^{ – 2}}.4 + \left[ {{{\left( { – 2} \right)}^2}:\dfrac{1}{2}} \right].8\\
     = {2^3} + 3.1 – {2^{ – 2}}{.2^2} + {\left( { – 2} \right)^{2 – 1}}{.2^3}\\
     = 8 + 3 – 1 – 2\\
     = 8
    \end{array}$

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )