Предмет: Математика, автор: alice14

lim x->3 x^2-9/x^2-2x-3 x->3

Ответы

Автор ответа: Аноним

lim(x-3)(x+3)/(x+1)(x-3)=lin(x+3)/(x+1)=(3+3)/(3+1)=6/4=1,5
x²-2x-3=0
x1+x2=2 U x1*x2=-3⇒x1=-1 U x2=3

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