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Home > PC > Chapter 8 > Lesson 8.2.3 > Problem 8-109


An exponential function has an asymptote at . The function passes through the points and . Find the -intercept for the function exactly and then calculate it to three decimal places.

Write the exponential form:

Substitute each point in for forming two equations and two unknowns.

Solve for '' and '' and substitute the contants into the function.

Using the new function, substitute '' for '' and simplify. This is the -intercept.