Hàm số

N

nguyenbahiep1

[laTEX]pttt: (d): y = \frac{x_0^2+2x_0}{(x_0+1)^2}(x-x_0) + \frac{x_0^2+x_0+1}{(x_0+1)} \\ \\ M \in (d) \Rightarrow -1 = \frac{x_0^2+2x_0}{(x_0+1)^2}(1-x_0) + \frac{x_0^2+x_0+1}{(x_0+1)} \\ \\ x_0^2 + 3x_0 +1 =0 \\ \\ x_0 = \frac{-3 \pm \sqrt{5}}{2} \\ \\ f'(\frac{-3 - \sqrt{5}}{2}).f'(\frac{-3 + \sqrt{5}}{2}) = - 1 \Rightarrow dpcm[/laTEX]
 
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