Diketahui f(x) = 4x+3 dan g(x)=2x-2. Tentukan: a. (f+g)(-2) b. (f-g)(0) Jawab:
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Penjelasan dengan langkah-langkah:
[tex]f(x) = 4x + 3[/tex]
[tex]g(x) = 2x - 2[/tex]
[tex] \: [/tex]
[tex](f + g)( - 2) = f( - 2) + g( - 2)[/tex]
[tex](f + g)( - 2) = 4x+ 3 + 2x - 2[/tex]
[tex](f + g)( - 2) = 4.( - 2) + 3 + 2.( - 2) - 2[/tex]
[tex](f + g)( - 2) = - 8 + 3 - 4 - 2[/tex]
[tex](f + g)( - 2) = - 11[/tex]
[tex] \: [/tex]
[tex](f - g)(0) = f(0) - g(0)[/tex]
[tex](f - g)(0) = 4x + 3 - (2x - 2)[/tex]
[tex](f - g)(0) = 4.0 + 3 - (2.0 - 2)[/tex]
[tex](f - g)(0) = 0 + 3 -( 0 - 2)[/tex]
[tex](f - g)(0) = 3 - ( - 2)[/tex]
[tex](f - g)(0) = 5[/tex]
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