We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
156
3
avatar+381 

Thanks, some of these I kind of need to refresh up on, lol.

 

1.

Graph the functions on the same coordinate plane.

f(x)=−2x

g(x)=x^2−3

 

What are the solutions to the equation f(x)=g(x)?

 

Options (get each correct one)

−3

−2

0

1

3

 

2.

Which characteristic is correct for the function f(x)=−2x^3+3x ?

Odd

Even 

Neither even nor odd

both even and odd

 

3.

What is (f+g)(x)?

 

f(x)=x^2−36

g(x)=x^3+2x^2−10

 

(f+g)(x)=

 

Thanks a million!!!!!!!!!!!!!

 Mar 15, 2019
 #1
avatar+104026 
+1

1. See the graph here, PF  :  https://www.desmos.com/calculator/xshyczl312

The solutions occur at x = -3   and x = 1

 

2.   2x^3 + 3x

If  we can put -x  into the function and come back to what we started with...it is even

So..... 2(-x)^3 + 3(-x)   =   -2x^3 - 3x = f(-x)  ......not what we started with...so..not even

 

If  f(-x) = -f (x) ......then it is odd

-f(x)  =  - [ 2x^3 + 3x ]  =  -2x^3 - 3x   = f(-x)....so...it's odd

 

 

3.  (f + g) x  means  f(x) + g(x)  =  [ x^2 - 36 ] + [ x^3 + 2x^2 -10 ]  = x^3 + 3x^2 - 46

 

 

cool cool cool

 Mar 15, 2019
 #2
avatar+381 
+1

Thanks for the help CPhill! smiley 

PhoenixForever  Mar 15, 2019
 #3
avatar+104026 
0

No prob !!!

 

cool cool cool

CPhill  Mar 15, 2019

10 Online Users

avatar