limit as t approaches-2 of t^2+5t+7

解答

t \to - 2 lim (t^{2} + 5 t + 7)

1

求解步骤

t \to - 2 lim (t^{2} + 5 t + 7)

代入值

t = - 2

= (- 2)^{2} + 5 (- 2) + 7

化简

(- 2)^{2} + 5 (- 2) + 7 : 1

= 1

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