Question

求此函数极限：当x→+0时,求f(x)=【(x+2)e^x-3x-2】/x^2

Answer 1

f(x)=lim(x->+0)【(x+2)e^x-3x-2】/x^2=lim(x->+0)(e^x(x+3)-3)/2x=lim(x->+0)e^x(x+4)/2=4/2=2