Operations on Functions (Composite functions)

Operations on Functions (Composite functions)

9th - 12th Grade

6 Qs

quiz-placeholder

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Operations on Functions (Composite functions)

Operations on Functions (Composite functions)

Assessment

Quiz

Mathematics

9th - 12th Grade

Medium

Created by

Steven Malabicky

Used 2+ times

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6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 f(x)=(3x24x)f\left(x\right)=\left(3x^2-4x\right)  
 g(x)=(5x23x+1)g\left(x\right)=\left(5x^2-3x+1\right)  

 (f+g)(x)=\left(f+g\right)\left(x\right)=  

 8x2x+18x^2-x+1  

 8x27x+18x^2-7x+1  

 8x2+x+18x^2+x+1  

 8x2+7x+18x^2+7x+1  

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 f(x)=5x3f\left(x\right)=5x-3  
 g(x)=4x+9g\left(x\right)=4x+9  
 (gf)(x)= \left(\frac{g}{f}\right)\left(x\right)=\   and what is the domain?

 (4x+9)(5x3)\frac{\left(4x+9\right)}{\left(5x-3\right)}   x35x\ne-\frac{3}{5}  

 (4x+9)5x3\frac{\left(4x+9\right)}{5x-3}   x35x\ne\frac{3}{5}  

 (5x3)4x+9\frac{\left(5x-3\right)}{4x+9}   x94x\ne\frac{9}{4}  

 (5x3)4x+9 \frac{\left(5x-3\right)}{4x+9}\    x94x\ne-\frac{9}{4}  

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 f(x)=2x24x6f\left(x\right)=2x^2-4x-6  
 g(x)=(7x2+4x5)g\left(x\right)=\left(-7x^2+4x-5\right)  

 (fg)(x)=\left(f-g\right)\left(x\right)=  

 5x211-5x^2-11  

 9x28x19x^2-8x-1  

 9x219x^2-1  

 5x28x11-5x^2-8x-11  

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 f(x)=2x2+3x4f\left(x\right)=2x^2+3x-4  
 g(x)=3x2g\left(x\right)=3x-2  

 (fg)(x)\left(f\cdot g\right)\left(x\right)  =

 6x3+5x218x+86x^3+5x^2-18x+8  

 6x3+5x26x+86x^3+5x^2-6x+8  

 6x3+13x218x+86x^3+13x^2-18x+8  

 6x3+13x2+6x+86x^3+13x^2+6x+8  

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 f(x)=x2x1f\left(x\right)=x^2-x-1  
 g(x)=2xg\left(x\right)=2x  

 (f ° g)(x)=\left(f\ \degree\ g\right)\left(x\right)=  

 4x22x14x^2-2x-1  

 4x2x14x^2-x-1  

 2x22x12x^2-2x-1  

 2x24x12x^2-4x-1  

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 (g ° f)(x)=\left(g\ \degree\ f\right)\left(x\right)=  

 f(x)=3x+2f\left(x\right)=3x+2  
 g(x)=x2+2x4g\left(x\right)=x^2+2x-4  


 9x2+6x+49x^2+6x+4  

 9x2+18x49x^2+18x-4  

 9x2+18x+49x^2+18x+4  

 9x26x49x^2-6x-4  

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