Penjelasan dengan langkah-langkah:
f(x) = x² - 4
g(x) = (x + 3)/(2x - 1) {x ≠ 1/2}
(fog)(x)
= ((x + 3)/(2x - 1))² - 4
= (x + 3)²/(2x - 1)² - 4
= ((x² + 6x + 9) - 4(4x² - 4x + 1))/(4x² - 4x + 1)
= (x² + 6x + 9 - 16x² + 16x - 4)/(4x² - 4x + 1)
= (-15x² + 22x + 5)/(4x² - 4x + 1)
Jawab:
(fog)(x) = (-15x² + 22x + 5)/(4x² - 4x + 1)
g(x) = (x + 3)/(2x - 1)
{x ≠ ½}
(f о g)(x) = f(g(x))
[tex]=f(\frac{x+3}{2x-1} )\\\\=(\frac{x+3}{2x-1} )^{2} -4\\\\=\frac{(x+3)^{2} }{(2x-1)^{2} } -4\\\\=\frac{-4(2x-1)^{2}+(x+3)^{2} }{(2x-1)^{2}} \\\\=\frac{-4(4x^{2} -4x+1)+(x^{2} +6x+9)}{(2x-1)^{2}} \\\\=\frac{-16x^{2} +16x-4+x^{2} +6x+9}{(2x-1)^{2}} \\\\=\frac{-15x^{2} +22x+5}{4x^{2} -4x+1}[/tex]
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Verified answer
Penjelasan dengan langkah-langkah:
f(x) = x² - 4
g(x) = (x + 3)/(2x - 1) {x ≠ 1/2}
(fog)(x)
= ((x + 3)/(2x - 1))² - 4
= (x + 3)²/(2x - 1)² - 4
= ((x² + 6x + 9) - 4(4x² - 4x + 1))/(4x² - 4x + 1)
= (x² + 6x + 9 - 16x² + 16x - 4)/(4x² - 4x + 1)
= (-15x² + 22x + 5)/(4x² - 4x + 1)
Jawab:
(fog)(x) = (-15x² + 22x + 5)/(4x² - 4x + 1)
Penjelasan dengan langkah-langkah:
f(x) = x² - 4
g(x) = (x + 3)/(2x - 1)
{x ≠ ½}
(f о g)(x) = f(g(x))
[tex]=f(\frac{x+3}{2x-1} )\\\\=(\frac{x+3}{2x-1} )^{2} -4\\\\=\frac{(x+3)^{2} }{(2x-1)^{2} } -4\\\\=\frac{-4(2x-1)^{2}+(x+3)^{2} }{(2x-1)^{2}} \\\\=\frac{-4(4x^{2} -4x+1)+(x^{2} +6x+9)}{(2x-1)^{2}} \\\\=\frac{-16x^{2} +16x-4+x^{2} +6x+9}{(2x-1)^{2}} \\\\=\frac{-15x^{2} +22x+5}{4x^{2} -4x+1}[/tex]