**Show graphically that which of the following is one to one function (1)f(x)=ln(x) (2)g(x)=e^x (3) h(x)=x³**

The **Answer to the Question**

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**Here's the Solution to this Question**

If some horizontal line intersects the graph of the function more than once, then the function is not one-to-one. Otherwise, the function is one-to-one.

1) $f(x)=ln(x)$

There is no horizontal line that intersects the graph of the function more than once. Therefore $f(x)=ln(x)$ is one-to-one function.

2) $g(x)=e^x$

There is no horizontal line that intersects the graph of the function more than once. Therefore $g(x)=e^x$ is one-to-one function.

3) $h(x)=x^3$

There is no horizontal line that intersects the graph of the function more than once. Therefore $h(x)=x^3$ is one-to-one function.

Answer: all three functions are one-to-one.