jika DF -12cm tentukan
f(x) = x² + 2x - 3
f(-3) = (-3)² + 2(-3) - 3 = 9 - 6 - 3 = 0
f(-2) = (-2)² + 2(-2) - 3 = 4 - 4 - 3 = -3
f(-1) = (-1)² + 2(-1) - 3 = 1 - 2 - 3 = -4
f(0) = 0² + 2(0) - 3 = 0 + 0 - 3 = -3
f(1) = 1² + 2(1) - 3 = 1 + 2 - 3 = 0
Df = {-3, -2, -1, 0, 1}
Rf = {0, -3, -4, -3, 0}
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