
Concept explainers
a.
Show that the value of f(x) approaches the value of g(x) by graphically.
a.

Explanation of Solution
Given:
It is given in the question that the function are f(x)=1+(0.5x)x and g(x)=e0.5 also x increases without bound.
Concept Used:
In this,use the graph calculator and use the knowledge to understand the graph carefully and by this show it.
Proof:
The graph of f(x)=1+(0.5x)x and g(x)=e0.5 are given below in same window.
The red line show the graph of f(x)=1+(0.5x)x .
The blue line show the graph of g(x)=e0.5 .
From the graph , it is clearly seen that the curve of g(x) overlaps the curve of f(x).
So by this it proves that the value of f(x) approaches the value of g(x) .
b.
Show that the value of f(x) approaches the value of g(x) by numerically.
b.

Explanation of Solution
Given:
It is given in the question that the function are f(x)=1+(0.5x)x and g(x)=e0.5 also x increases without bound.
Concept Used:
In this , use the concept of changing the function by suitable arrangement and also use the concept (1+1x)x→e as x→∞ .
Proof: There are two functions f(x)=1+(0.5x)x and g(x)=e0.5 .
As it is know that (1+1x)x→e as x→∞
Now, the f(x) can be rewrite as:
f(x)=(1+0.5x)x=(1+12x)x=[(1+12x)2x]0.5Let 2x=y=[(1+1y)y]0.5→e0.5=√e (x↔y)
Chapter 3 Solutions
Precalculus with Limits: A Graphing Approach
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