Question

ПОМОГИТЕ НОМЕР 149 ПОЖАЛУЙСТА!!!!!!!!!!!

Answer 1

$lim_{x to 1}( 5x+2)=5cdot1+2=7 \ lim_{x to -5}( frac{x^2-25}{x+5} )= lim_{x to -5} frac{(x-5)(x+5)}{x+5}= \ = lim_{x to -5}( x-5 )=-5-5=-10 \ lim_{x to -3}( x^3-2x+1)=(-3)^3-2cdot(-3)+1=-27+6+1=-20 \ lim_{x to 2}( 3x^2-2x+1)=3cdot2^2-2cdot2+1=12-4+1=9 \ lim_{x to 1}( frac{x-1}{x^2-1} )= lim_{x to 1} frac{x-1}{(x-1)(x+1)}=lim_{x to 1} frac{1}{x+1}= frac{1}{1+1}= frac{1}{2} \ lim_{x to 5}( x^3-3x-1)=5^3-3cdot5-1=125-15-1=109$