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�� 8.1. �� ?y � (?x>0)lim(?y/?x), ��:�) y=0,4x, x_0=-1, ?x=0,25;�) y=x^2, x_0=1, ?x=0,01;�) y=vx, x_0=4, ?x=0,41;�) y=-5x+6, x_0=0,...

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8.1. �� ?y � (?x > 0)lim(?y/?x), ��:

�) y=0,4x, x_0=-1, ?x=0,25;

�) y=x^2, x_0=1, ?x=0,01;

�) y=vx, x_0=4, ?x=0,41;

�) y=-5x+6, x_0=0, ?x=0,15;

�) y=x^3, x_0=2, x=0,1;

�) y=1/x, x_0=3, ?x=0,2.

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