3. a. f ( x ) = 2x + 1
b. f ( x + 1 ) = 2 ( x + 1 ) + 1
= 2x + 2 + 1
= 2x + 3
c. f ( 2x ) = 2 ( 2 dikali x ) + 1
= 4x + 2x + 1
= 6x + 1
d. f ( 2x + 1 ) = 2x ( 2 dikali x + 1 ) + 1
= 4x + 2x + 2 + 1
= 6x + 3
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3. a. f ( x ) = 2x + 1
b. f ( x + 1 ) = 2 ( x + 1 ) + 1
= 2x + 2 + 1
= 2x + 3
c. f ( 2x ) = 2 ( 2 dikali x ) + 1
= 4x + 2x + 1
= 6x + 1
d. f ( 2x + 1 ) = 2x ( 2 dikali x + 1 ) + 1
= 4x + 2x + 2 + 1
= 6x + 3
Semoga membantu...