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i feel horrible blushasking this much questions but i already took this test so many times and keep getting an D- and this is the last time i can take it.. can anyone help me with these 12 questions? these are the only ones i keep getting wrong.

i really need a c to pass

Thanks so much sad

 

 

1.If f(x) =√3x+3 , what is the equation for f^–1(x)?

 

2.If the parent function is √x, describe the translation of the function √x+7

 

3.Rewrite y = √9x+45  +2 to make it easy to graph using a translation. Describe the graph. 

 

4.The graph of y=^3√x  is shifted 1 unit down and 4 units left. Which equation represents the new graph?

 

5.Let f(x) = -4x + 7 and g(x) = 2x - 6. Find (G o F)(1)

 

6.If f(x) = 2x – 7, what is the equation for f–1(x)?

 

7.If f(x)=1/2x-6 , what is the equation for f–1(x)?

 

8.If the parent function is 3^√x , describe the translation of the function y =3^√x-4  + 3

 

9.Let f(x) = 2x - 7 and g(x) = -6x - 3. Find f(x) + g(x) and state its domain.

 

10.et f(x) = 4x - 7 and g(x) = 2x - 3. Find (F o G)(4)

 

11.Let f(x) = 4x + 7 and g(x) = 3x - 5. Find (G o F)(-4)

 

12. Let f(x) = 4x + 3 and g(x) = -2x + 5. Find (F o G)(5)

 May 30, 2016
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I'll do a couple

 

1.If f(x) =√3x+3 , what is the equation for f^–1(x)?

 

Let

\(Let\;\;y=f(x)\\ y=\sqrt3x+3\\ y-3=\sqrt3x\\ \frac{y-3}{\sqrt3}=x\\ x=\frac{\sqrt3(y-3)}{3}\\~\\ f^{-1}(x)=\frac{\sqrt3(x-3)}{3}\\~\\ \)

 

2.If the parent function is √x, describe the translation of the function √x+7

This is a translation 7 units up

 

3.Rewrite y = √9x+45  +2 to make it easy to graph using a translation. Describe the graph. 

y = √9x+45  +2

y = 3x+47

The parent graph could be y=3x     gradient is 3 moved up so the y intercept is 47

 May 30, 2016

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