BIG POINT Suatu fungsi dirumuskan oleh f(x+3) = 4x + 5. Nilai dari f(21) adalah...a. 72b. 77c. 84d. .... Question from @STUDYWITHINDONESIAN

STUDYWITHINDONESIAN @STUDYWITHINDONESIAN

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BIG POINT
Suatu fungsi dirumuskan oleh f(x+3) = 4x + 5. Nilai dari f(21) adalah...
a. 72
b. 77
c. 84
d. 89

ItzJustMe

$f(x + 3) = 4x + 5$

$f(x) + 3 = 4x + 5$

$f(x) = 4x + 5 - 3$

$f(x) = 4x + 2$

$f(21) = 4(21) + 2$

$f(21) = 84 + 2$

$f(21) = 86$

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SOAL 1

___________________________________________

f(x + 3) = 4x + 5

f(x) = 4x + 5 - 3

f(x) = 4x + 2

___________________________________________

f(21) = 4(21) + 2

f(21) = (4.21) + 2

f(21) = 84 + 2

f(21) = 86

___________________________________________ ${\mathcal\color{purple}{{\pink{\underline{\purple{\underline\bold{\pink{X}\bold\color{violet}{x\bold{\pink{F}\bold\color{violet}{i\bold{\pink{q}\bold\color{violet}{a\bold{\pink{h}\bold\color{violet}{\bold{\pink{}\bold\color{violet}{\bold{\pink{}\bold\color{violet}{\bold{\pink{}\bold\color{violet}{x\bold{\pink{X}}}}}}}}}}}}}}}}}}}}}}$

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