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a) f(2).= -2(2) + 7 = -4 + 7 = 3
b) f(-3).= -2(-3) + 7 = 6 + 7 = 13
►2. f (a) = 1/3 a + 4
a) f (0).= 1/3(0) + 4 = 0 + 4 = 4
b) f (-12).= 1/3 ( -12) + 4 = -12/3 + 4 = -4 + 4 = 0
SALUDOS!