ini gmn carany tlg APA cmn Di pindah2in

≡ penyelesaian :

f( 4x - 1 ) = a
4x - 1 = a
4x = a + 1
x = ( a + 1 ) / 4

f(a) = 8a + 4
f(a) = 8( ( a + 1 ) / 4 ) + 4
f(a) = 2( a + 1 ) + 4
f(a) = 2a + 2 + 4
f(a) = 2a + 6

maka,

f(3) = 2(3) + 6
f(3) = 6 + 6
f(3) = 12 [ opsi. C ]

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