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2 - x < 3
x
2 - x < 3x
-x - 3x < -2
-4x < -2
x > 1/2 (B)
52.
f(-x) = - f(x)
f(3) = -5
f(-5) = 1
f(f(-3)) = ??
f(-f(3)) = -f(f(3))
= -f(-5)
= -(1)
= -1 (c)
cuman 2 yah , soalnya gak kelihatan lagi :D
x
2 - x = 3
x
2 - x = 3x
2 = 3x + x
2 = 4x
x = 1/2
jawabannya B