Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

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

Toán Lớp 11: lim x=>1 2x^4-5x^3+3x^2+1/3x^4-8x^3+6x^2-1

Toán Lớp 11: lim x=>1 2x^4-5x^3+3x^2+1/3x^4-8x^3+6x^2-1

Comments ( 2 )

  1. $\begin{array}{l}
    \mathop {\lim }\limits_{x \to 1} \dfrac{{2{x^4} – 4{x^3} + 3{x^2} + 1}}{{3{x^4} – 8{x^3} + 6{x^2} – 1}}\\
     = \dfrac{{\mathop {\lim }\limits_{x \to 1} \left( {2{x^4} – 4{x^3} + 3{x^2} + 1} \right)}}{{\mathop {\lim }\limits_{x \to 1} \left( {3{x^4} – 8{x^3} + 6{x^2} – 1} \right)}}\\
     =  \pm \infty 
    \end{array}$
    Do $3x^4-8x^3+6x^2-1$ có nhân tử là $x-1$ nên$\mathop {\lim }\limits_{x \to 1} \left( {3{x^4} – 8{x^3} + 6{x^2} – 1} \right)=0$