Question

Which of the following functions has the largest value when x = 3 (1 point)?

c(x) = 3x2 + 5x + 22
j(x) = 12x
a(x) = 9x

Group of answer choices

All the functions are equal at x = 3.

c(x)

j(x)

a(x)

Answer 1

x = 3

c(x) = 3x² + 5x + 22

⇒ c(3) = 3(3²) + 5(3) + 22

⇒ c(3) = 3(9) + 15 + 22

⇒ c(3) = 27 + 15 + 22

⇒ c(3) = 64

j(x) = 12x

⇒ j(3) = 12(3)

⇒ j(3) = 36

a(x) = 9x

⇒ a(3) = 9(3)

⇒ a(3) = 27

c(x) = 3x² + 5x + 22 is the function that has the largest value when x = 3.

False. Not all functions are equal at x = 3.