算术题lim(n→3)5X平方-7X-2分之X平方-9

问题描述:

算术题lim(n→3)5X平方-7X-2分之X平方-9
lim(n→3)5X平方-7X-2分之X平方-9
lim(X→1)3X+4分之2X平方-1
=lim(n→3) x^2-9/ 5X^2-7X-2

lim(x→3)5X平方-7X-2分之X平方-9 =lim(n→3)5X^2-(x^2-9)/(7X-2) =lim(n→3)5X^2-lim(n→3)(x^2-9)/(7X-2) =45-0/19 =45 lim(X→1)3X+4分之2X平方-1 =lim(X→1)(2X^2-1)/(3x+4) =lim(X→1)(2X^2-1)/[...