Question

find the inverse function of FX = x - 3​

Answer 1

Answer:

If you want to find the inverse of a function y=f(x) first write x as a function of y and after that exchange y and x.

So y=f(x)=x-3, write x as a function of y, x=y+3 and after that exchange x and y : y=x+3.

Answer 2

Answer:

• ʀᴇᴡʀɪᴛᴇ ᴛʜᴇ ꜰᴜɴᴄᴛɪᴏɴ ꜰ ( x ) = x - 3

• ᴀꜱ ᴀ ᴇqᴜᴀᴛɪᴏɴ y = x + 3

• x = y - 3

• x + 3 = y

• y = x + 3

• ᴛʜᴇ ꜱyᴍʙᴏʟ ꜰᴏʀ ᴛʜᴇ ɪɴᴠᴇʀꜱᴇ ɪꜱ ꜰ - 1 ( x )

• ꜰ + 1 ( x ) = x + 3