Square Root Functions

Question 1

What is the domain of the function ?

Revolt · Accepted Answer

x greater-than-or-equal-to negative 6

Question 2

Which equation can be simplified to find the inverse of y = 5x2 + 10?

Revolt · Accepted Answer

x = 5y2 + 10

Question 3

Which equation can be simplified to find the inverse of y = 2x2?

Revolt · Accepted Answer

x = 2y2

Question 4

Which equation is the inverse of y = 100 – x2?

Revolt · Accepted Answer

y = plus-or-minus StartRoot 100 minus x EndRoot

Question 5

Which equation is the inverse of 2(x – 2)2 = 8(7 + y)?

Revolt · Accepted Answer

y = 2 plus-or-minus StartRoot 28 + 4 x EndRoot

Question 6

Which equation is the inverse of ?

Revolt · Accepted Answer

y = negative 3 plus-or-minus StartRoot 5 x + seven-halves EndRoot

Question 7

If , which inequality can be used to find the domain of f(x)?

Revolt · Accepted Answer

x minus 3 greater-than-or-equal-to 0

Question 8

Which equation is the inverse of y = 2x2 – 8?

Revolt · Accepted Answer

y = plus-or-minus StartRoot StartFraction x + 8 Over 2 EndFraction EndRoot

Question 9

Which equation is the inverse of y = 16x2 + 1?

Revolt · Accepted Answer

y = StartFraction plus-or-minus StartRoot x minus 1 EndRoot Over 4 EndFraction

Question 10

If the domain of the square root function f(x) is , which statement must be true?

Revolt · Accepted Answer

The x-term inside the radical has a negative coefficient.

Square Root Functions Answers