Sari N

11 Februari 2023 13:32

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Sari N

11 Februari 2023 13:32

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diketahui f(x) = x³ dan g(x) = 2x - 8. nilai dari (g o f)^-1(8) =...

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Renfoy R

11 Februari 2023 18:32

Jawaban terverifikasi

<p>f(x) = x<sup>3</sup></p><p>g(x) = 2x-8</p><p>g(f(8))<sup>-1</sup>?</p><p>&nbsp;</p><p>(g o f)(x)=g(f(x))</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;=g(x<sup>3</sup>)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;=2(x<sup>³</sup>)-8</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;=2x<sup>3</sup>-8</p><p>g(f(x))= 2x<sup>3</sup>-8</p><p>y= 2x<sup>3</sup>-8</p><p>y-2x<sup>3 </sup>=-8</p><p>x<sup>3</sup>=-8/-2–y/-2</p><p>x= <sup>3</sup>√4+y/2</p><p>g(f(x))<sup>-1</sup>= <sup>3</sup>√4+x/2</p><p>g(f(8))<sup>-1 </sup>= <sup>3</sup>√4+8/2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= <sup>3</sup>√4+4</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= <sup>3</sup>√8</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 2</p>

f(x) = x3

g(x) = 2x-8

g(f(8))-1?

 

(g o f)(x)=g(f(x))

               =g(x3)

               =2(x³)-8

               =2x3-8

g(f(x))= 2x3-8

y= 2x3-8

y-2x3 =-8

x3=-8/-2–y/-2

x= 3√4+y/2

g(f(x))-1= 3√4+x/2

g(f(8))-1 = 3√4+8/2

               = 3√4+4

               = 3√8

               = 2


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