What is the inverse function of #f(x)=4x+3#?

Question

10443 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-10-15T06:36:09

#=>f^-1(x)=(x-3)/4# is the inverse function

#f(x)=y=>y=4x+3# because #f(x)# is another way of writing #y#

The first thing you have to do is to switch #y# and #x# then find the new value of #y#, which gives you the inverse of your function #=>f^-1(x)#

#x=4y+3#

#4y=x-3#

#y=(x-3)/4#

#=>f^-1(x)=(x-3)/4#

Hope this helps :)