limit as x approaches-1 of x^2-5x+6

解答

x \to - 1 lim (x^{2} - 5 x + 6)

12

求解步骤

x \to - 1 lim (x^{2} - 5 x + 6)

代入值

x = - 1

= (- 1)^{2} - 5 (- 1) + 6

化简

(- 1)^{2} - 5 (- 1) + 6 : 12

= 12

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