Tangent Lines to Exponential and Logarithmic Functions through the Origin
Tangent Lines to Exponential and Logarithmic Functions through the Origin
For each exponential function ,a>0, draw the tangent line through the origin. The points of tangency lie on the horizontal line Likewise, for the logarithmic functions , the points of tangency lie on the vertical line .
x
a
y=e.
y=x,b>0
log
b
x=e