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mencari invers x - 5
y = x-5
x = y+5
invers = x+5
f(x) = (x+5)²+2
= x²+10x+25+2
= x²+10x+27
2) g(2x) = 3x²+2
mencari invers 2x
y = 2x
x = y/2
invers = x/2
g(x) = 3(x/2)² + 2
= 3/4 x² + 2
3) f(1/2 x) = x² / x-1
mencari invers 1/2 x
y = 1/2 x
x = 2y
invers = 2x
f(x) = (2x)² / 2x-1
= 4x² / 2x-1
4) h(2x+6) = 4x²+2x
mencari invers 2x+6
y = 2x+6
2x = y-6
x = y-6 / 2
invers = x-6 / 2
h(x) = 4(x-6 / 2)² + 2 (x-6 / 2)
= (x-6)² + x-6
= x²-12x+36+x-6
= x²-11x+30
5) f(x+5) = x²+2x+1
mencari invers x+5
y = x+5
x = y-5
invers = x-5
f(x) = (x-5)² +2(x-5) + 1
f(3) = (3-5)² +2 (3-5) + 1
= (-2)² + 2(-2) + 1
= 4-4+1
= 1