4. ( f o g )(x) = f[ g(x) ]
= f( x - 2 )
= 5( x - 2 )
= 5x - 10
( f o g )(x) = y
5x - 10 = y
5x = y + 10
5. f(x) = 4x - x² = 0
a = -1, b = 4, c = 0
D = b² - 4ac
= 4² - 4(-1).0
= 16 + 0 = 16
-D/4a = -16/4(-1) = -16/-4 = 4
-b/2a = -4/2(-1) = -4/-2 = 2
Koordinat titik balik maksimum
( -b/2a, -D/4a ) = ( 2, 4 )
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4. ( f o g )(x) = f[ g(x) ]
= f( x - 2 )
= 5( x - 2 )
= 5x - 10
( f o g )(x) = y
5x - 10 = y
5x = y + 10
5. f(x) = 4x - x² = 0
a = -1, b = 4, c = 0
D = b² - 4ac
= 4² - 4(-1).0
= 16 + 0 = 16
-D/4a = -16/4(-1) = -16/-4 = 4
-b/2a = -4/2(-1) = -4/-2 = 2
Koordinat titik balik maksimum
( -b/2a, -D/4a ) = ( 2, 4 )