# Derivatives of exponential functions

1. Homework Statement

find the equation of the tangent to the curve defined by y=e^x that is perpendicular to the line defined by 3x+y=1

2. Homework Equations

m= 1/3 (negative reciprocal of y=-3x+1)
derivative of e^x=e^x

3. The Attempt at a Solution

i keep getting stuck at 1/3=e^x ( i know theres a way to solve for x i just cant remember)