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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 12: “y = x^4 – x^2 + 5 tìm cực trị”

Toán Lớp 12: “y = x^4 – x^2 + 5 tìm cực trị”

Comments ( 2 )

  1. ~rai~
    \(y=x^4-x^2+5\\+)D=\mathbb{R}\\+)y’=4x^3-2x\\+)y’=0\Rightarrow \left[\begin{array}{I}x=\dfrac{\sqrt{2}}{2}\\x=0\\x=-\dfrac{\sqrt{2}}{2}\end{array}\right.\\\text{Bảng biến thiên:}\\\begin{array}{|c|cr|}\hline x&-\infty&&&-\dfrac{\sqrt{2}}{2}&&&0&&&\dfrac{\sqrt{2}}{2}&&&+\infty\\\hline y’&&&-&0&&+&0&&-&0&&+&\\\hline y&+\infty&&\searrow&&&\nearrow&5&&\searrow&&&\nearrow&+\infty\\&&&&\dfrac{19}{4}&&&&&&\dfrac{19}{4}\\\hline\end{array}\\\text{Vậy hàm số có }y_{CĐ}=5;y_{CT}=\dfrac{19}{4}.\)

  2. Đáp án:
     
    Giải thích các bước giải:
     

    toan-lop-12-y-4-2-5-tim-cuc-tri

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222-9+11+12:2*14+14 = ? ( )