Question

lim      4x^2+11x-3   числит

x->-3    x^2+2x-3      знаменат

Answer 1

lim      4x^2+11x-3

          x^2+2x-3

x->-3 

 

 

rewaem v 4islitele 4x^2+11x-3

D=121+48=169=13^2

-11+13/8=1/4

-11-13/8=-3

togda v 4islitele budet

(x-0,25)(x+3)

2)rewaem v znamenatele

 x^2+2x-3

D=4+12=16

-2+4/2=1

-2-4/2=-3

(x-1)(X+3)

togda polu4aetsya

(x-0,25)(x+3)/(x-1)(x+3) (x+3) sokrawaytsya okan4atel'no polu4aetsya

lim(x-0,25)/(x-2)

x->-3 

podstavlyaem -3

(3-0,25)/(-3-2)=2.25/-5=-0,45 otvet