# Pre-Cal.

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find the inverse of the following function. Find the domain, range,and asymptotes of each function. Graph both functions on the same coordinate plane.
f(x)=3+lnx

• Pre-Cal. -

y = 3 + lnx
first step in finding the inverse is to interchange the x and y variables, so

inverse is
x = 3 + lny
x-3 = lny
y = e^(x-3)

in original y = 3 + lnx
domain , x > 0 , y is any real number

so in the inverse these two would be interchanged.

remember , when graphing an inverse of a function, you get a reflection in the line y = x

check:
in original, let x = 5
y = 3+ln5 = 4.6094... (I stored it in memory)

in inverse:
x = 4.6094
y = e^(1.6094) = 5
Yeahh

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