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Number 6 needs to be in set notation and number 9 needs to be in interval notation. I'm confused about the last two. Please explain because I need to understand these. Sorry.

 Jan 14, 2019
 #1
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6.

D =  (-inf, - 4) U (-4, inf)

R = (-inf, 2) U (2, inf)

Function because it passes the vertical line test

 

9. 

D =   x < -1   U  x > -1

R =   y  < - 4   U  y > - 4  

Function because it passes the vertical line test

 

20.

 

k ( -δw)  =   -2(-δw) - 15

                  __________

                    (-δw) + 9

 

21.   t(x + 4)  =  ( x + 4)^3 + 2(x + 4)  =  

 

        (x + 2)^2 (x + 4)  + 2x + 8  =

 

(x^2 + 4x + 16) (x + 4) + 2x + 8  =

 

x^3 + 4x^2 + 16x + 4x^2 + 16x  + 64 + 2x + 8  =

 

x^3 + 8x^2 + 34x + 72

 

 

cool cool cool

 Jan 14, 2019

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