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f(2*-1)=3(2*-1)=-12
f(x pangkat 2)=3(-2 pangkat 2)=12
b.f(x-a)=-12
f(x+a)-f(x)=-12
(maap susa banget)
a)
f(x+1) = 2(x+1) - 6
f(x+1) = 2x +2 - 6
f(x+1) = 2x - 4
f(2x-1) = 2(2x-1) - 6
f(2x-1) = 4x -2 - 6
f(2x-1) = 4x - 8
f(x²) = 2(x²) - 6
f(x²) = 2x² - 6
b)
f(x-a) = 2(x-a) - 6
f(x-a) = 2x - 2a - 6
f(x+a) = 2(x+a) - 6
f(x+a) = 2x + 2a - 6
f(x) = 2x - 6
f(x+a) - f(x) = 2x + 2a - 6 - (2x- 6)
f(x+a) - f(x)= 2x + 2a - 6 - 2x + 6
f(x+a) - f(x)= 2a