I really need help!!! This needs to be done so I can pass my overall grade in my class. Can anyone be willing to help.?

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1 Answer
Apr 28, 2018

See below

Explanation:

7.- Given #y=f(x)=1/2x-1# now we have to isolate x in function of y traslating terms

#y=1/2x-1#
#y+1=1/2x#
#2y+2=x# now interchange role of x and y and then

#y=2x+2=f^(-1)(x)#

8.- #y=f(x)=(x-2)/5#

#5y=x-2#

#5y+2=x#. Then #f^(-1)(x)=5x+2#

9.- #y=f(x)=root(3)(x+1)# powering to 3

#y^3=x+1#

#y^3-1=x# and then #f^(-1)(x)=x^3-1#