(3/4 nhân x -9/16) nhân (1/3 + -3/5 chia x) =0

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(3/4 nhân x -9/16) nhân (1/3 + -3/5 chia x) =0

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Ariana 5 tháng 2021-07-25T01:32:49+00:00 2 Answers 19 views 0

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    0
    2021-07-25T01:33:50+00:00

    Đáp án:
    \(\left[ \begin{array}{l}x=\dfrac{3}{4}\\x=\dfrac{9}{5}\end{array} \right.\) 
     

    Giải thích các bước giải:

    `(3/4 . x -9/16) . (1/3 + -3/5 : x) = 0`

    \(\left[ \begin{array}{l}\dfrac{3}{4} . x \dfrac{-9}{16}=0\\(\dfrac{1}{3} + \dfrac{-3}{5} : x) = 0\end{array} \right.\) 

    \(\left[ \begin{array}{l}\dfrac{3}{4} . x \dfrac{-9}{16}=0\\(\dfrac{1}{3} + \dfrac{-3}{5} : x) = 0\end{array} \right.\) 

    `\Rightarrow`\(\left[ \begin{array}{l}\dfrac{3}{4}x=0+\dfrac{9}{16}\\\dfrac{-3}{5}:x=\dfrac{-1}{3}\end{array} \right.\) 

    `\Rightarrow`\(\left[ \begin{array}{l}\dfrac{3}{4}x=\dfrac{9}{16}\\x=(\dfrac{-3}{5}):(\dfrac{-1}{3})\end{array} \right.\) 

    `\Rightarrow`\(\left[ \begin{array}{l}x=\dfrac{9}{16}:\dfrac{3}{4}\\x=(\dfrac{-3}{5}):(\dfrac{-1}{3})\end{array} \right.\) 

    `\Rightarrow`\(\left[ \begin{array}{l}x=\dfrac{9}{16}. \dfrac{4}{3}\\x=(\dfrac{-3}{5}).(-3)\end{array} \right.\) 

    `\Rightarrow`\(\left[ \begin{array}{l}x=\dfrac{3}{4}\\x=\dfrac{9}{5}\end{array} \right.\) 

    `\text{Vậy}`\(\left[ \begin{array}{l}x=\dfrac{3}{4}\\x=\dfrac{9}{5}\end{array} \right.\) 

    1
    2021-07-25T01:34:47+00:00

    `(3/4x-9/16).(1/3+ -3/5÷x)=0`

    `3/4x-9/16=0\text{ hoặc }1/3+ -3/5÷x=0`

    $\text{* $\dfrac{3}{4}$x – $\dfrac{9}{16}$ = 0.}$

    `⇒3/4x=0+9/16.`

    `⇒3/4x=9/16.`

    `⇒x=9/16÷3/4.`

    `⇒x=9/16. 4/3.`

    `⇒x=3/4.`

    $\text{* $\dfrac{1}{3}$ + $\dfrac{-3}{5}$ ÷ x= 0.}$

    `⇒-3/5÷x=-1/3.`

    `⇒x=(-3/5)÷(-1/3).`

    `⇒x=(-3/5).(-3/1).`

    `⇒x=9/5.`

    $\text{Vậy x = $\dfrac{3}{4}$ hoặc x = $\dfrac{9}{5}$.}$

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