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: y=tanx+2cosx. Xác định chẵn lẻ

Toán Lớp 11: y=tanx+2cosx. Xác định chẵn lẻ

Comments ( 2 )

  1. ĐK: $\cos x\ne 0\to x\ne \dfrac{\pi}{2}+k\pi$
    $\to$ TXĐ $D=\mathbb{R}$ \ $\left\{\dfrac{\pi}{2}+k\pi\right\}$ 
    $f(-x)=\tan(-x)+2\cos(-x)=-\tan x+2\cos x\ne f(x)\ne -f(x)$
    Vậy hàm số không chẵn không lẻ
     

Leave a reply

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