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(2)
lim(x->2) (2x^2-x+1)/(x^3-4)
=(8-2+1)/(8-4)
=7/4
(4)
lim(x->∞) (4x^3+2x^2-x)/(2x^3-3x^2+1)
=lim(x->∞) (4+2/x-1/x^2)/(2-3/x+1/x^3)
=4/2
=2
(6)
lim(x->∞) (2x- cosx)/x
=2 - lim(x->∞) (cosx/x)
=2-0
=2
(8)
lim(x->+∞) [√(x+1) -√x ]
=lim(x->+∞) 1/ [√(x+1) +√x ]
=0
lim(x->2) (2x^2-x+1)/(x^3-4)
=(8-2+1)/(8-4)
=7/4
(4)
lim(x->∞) (4x^3+2x^2-x)/(2x^3-3x^2+1)
=lim(x->∞) (4+2/x-1/x^2)/(2-3/x+1/x^3)
=4/2
=2
(6)
lim(x->∞) (2x- cosx)/x
=2 - lim(x->∞) (cosx/x)
=2-0
=2
(8)
lim(x->+∞) [√(x+1) -√x ]
=lim(x->+∞) 1/ [√(x+1) +√x ]
=0
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