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Pe: 2019-12-11T18:09:00+02:00 In: In:

Ajutor la temeee

4x2 = 1
x = ?

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  1. Admin

    Este destul de simpla 🙂

    x^{2} = \frac{1}{4} \Rightarrow x = \sqrt{\frac{1}{4}} \Rightarrow x = \frac{1}{2}

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  2. Este o mica greseala in rezolvare. Cand s-a aplicat radical in x2=1/4 trebuia |x| avand astfel 2 solutii.

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  3. Best Answer

    4x^{2}=1  |:4
    <=> x^{2}=\frac{1}{4}    |\sqrt{}
    <=> |x|=\sqrt{\frac{1}{4}}= \frac{1}{2}

    => S=\left \{-\frac{1}{2} ; \frac{1}{2}\}

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