Exercise 39 Page 273

We are given two functions. f(x)&=2x g(x)&=x^2+1 We need to evaluate them for certain values of x. In this case, we need to find f(5) - 2* g(1). This means we need to subtract two times the value of g(x) when x=1, from the value of f(x) when x=5.

Value of f(5)

Let's start by finding the value of f(5). To do this, substitute 5 for x in the function rule.

When x=5, f(x)= 10.

Value of g(1)

Now, we have to find the value of g(1). To do this, substitute 1 for x in the function rule.

When x=1, g(x)= 2.

Difference

Since we have both f(5) and g(1), we can find the value of our expression.