Ответы и объяснения

2013-08-27T12:23:37+00:00
A) f(x) = x^3
f(-1) = (-1)^3 = -1
f(1/2) = (1/2)^3= 1/8
f(2) = 2^3 = 8

б)f(x) = x^2 - 3x +2
f(-1) = 1 + 3 + 2 = 6
f(1/2) = 1/4 - 6/4 + 2 = -1,25 + 2 = 0,75 = 3/4
f(2) = 4 - 6 + 2 = 0

в)f(x)= x-2/x^2-2
f(-1) = -1-2/1-2 = 3
f(1/2) = 1/2 - 2/1/4-2 = -3/2 * 4/7 = -6/7
f(2) = 2-2/4-2 = 0

г)f(x) = 1/x^3
f(-1) = 1/-1 = -1
f(1/2) = 1/1/8 = 8
f(2) = 1/8