Understanding functions

What is the Domain of the relation below:

• A) {-2, -1, 0, 1, 2}

• B) All real numbers.

• C) {-2, 0, 1, 3}

• D) {-1, 0, 1, 3}

• ℝ

• [-2, ∞)

• [2, ∞)

• (-∞, 2]

Select each interval of the domain of the composite function:

 $y=\sqrt{x^4-5x^2+4}$  

•  $\left(-\infty,-2\right]$  

•  $\left[-2,-1\right]$  

•  $\left[-1,1\right]$  

•  $\left[1,2\right]$  

•  $\left[2,\infty\right)$  

The table shows some points on a parabola. What is the range of the function?

• All real numbers greater than or equal to - 62.

• All real numbers greater or equal to -53

• All real numbers less than -4

• All real numbers greater than -8

The domain and range of $f\left(x\right)=\log_5x$  are

• $D:\left\{x\ \epsilon\ R\right\}$
  $R:\left\{y>0,\ y\ \epsilon\ R\right\}$
  

• $D:\left\{x\ \epsilon\ R\right\}$
  $R:\left\{y\ \epsilon\ R\right\}$
  

• $D:\left\{x>0,\ x\ \epsilon\ R\right\}$
  $R:\left\{y\ \epsilon\ R\right\}$
  

• $D:\left\{x\ge0,\ x\ \epsilon\ R\right\}$
  $R:\left\{y\ \epsilon\ R\right\}$
  

what is the domain and range of an exponential function?

• $\left(-\infty,\infty\right)$

• $\left[0,\infty\right)$

• $\left(0,\infty\right)$

Describe the Domain:
 $y=\sqrt{x+2}-2$  

•  $x\ge-3$  

•  $x\ge-2$  

•  $x>1$  

•  $x\ge5$  

What is the domain of the following function: f(x)=3x-1

• [-1,3]
• (-∞,∞)
• (-1,∞)
• (-∞,-1)

Determine the range for the function

f(x) = 3(2)^x-4 + 5

• [5,∞)

• (5,∞)

• [4,∞)

• (4,∞)