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Diketahui f(x)=x+4, g(x)=3x−1 maka (g∘f)(x)=...

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Diketahui begin mathsize 14px style f left parenthesis x right parenthesis equals x plus 4 comma space g left parenthesis x right parenthesis equals 3 x minus 1 end style maka begin mathsize 14px style open parentheses g ring operator f close parentheses open parentheses x close parentheses equals... end style 

I. Roy

Master Teacher

Mahasiswa/Alumni Universitas Negeri Surabaya

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Pembahasan

 size 14px left parenthesis size 14px g size 14px ring operator size 14px f size 14px right parenthesis begin mathsize 14px style left parenthesis x right parenthesis end style size 14px equals size 14px g begin mathsize 14px style left parenthesis f open parentheses x close parentheses right parenthesis end style size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px equals size 14px g begin mathsize 14px style left parenthesis x plus 4 right parenthesis end style size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px equals size 14px 3 begin mathsize 14px style left parenthesis x plus 4 right parenthesis end style size 14px minus size 14px 1 size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px equals size 14px 3 size 14px x size 14px plus size 14px 12 size 14px minus size 14px 1 size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px space size 14px equals size 14px 3 size 14px x size 14px plus size 14px 11     

Jadi, begin mathsize 14px style left parenthesis g ring operator f right parenthesis left parenthesis x right parenthesis equals 3 x plus 11 end style

 

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Diketahui fungsi f:R→R dan g:R→R dengan f(x)=x−2 dan g(x)=3x+41​. tentukan : b. (g∘f)(4)

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