Question

Given the function f defined by the formula f(x)=2x+1 find the following

A. f(4) B.f(-5) C.f(0) D.f(1/2)


please show your work

Answer 1

$f(4)=2\cdot4+1=9\\ f(-5)=2\cdot(-5)+1=-9\\ f(0)=2\cdot0+1=1\\ f\left(\dfrac{1}{2}\right)=2\cdot\dfrac{1}{2}+1=2$

Answer 2

The function f defined by the formula f(x) = 2x +1 can be expressed as: f(4) = 9; f(-5) = - 9, f(0) = 1, $\mathbf{f(\dfrac{1}{2}) = 2}$

The function of a function defines and explains the relationship between two different variables. From the given information, we are meant to replace x with the following given options and solve for the value of x.

f(4) = 2(4) + 1

f(4) = 8 + 1

f(4) = 9

f(-5) = 2(-5) + 1

f(-5) = -10 + 1

f(-5) = - 9

f(0) = 2(0) + 1

f(0) = 0 + 1

f(0) = 1

$\mathbf{f(\dfrac{1}{2}) = 2(\dfrac{1}{2})+1}$

$\mathbf{f(\dfrac{1}{2}) = 1+1}$

$\mathbf{f(\dfrac{1}{2}) = 2}$

Learn more about the function of a function here:

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