todoroxi77 todoroxi77

19-07-2021
Mathematics

contestada

Find the range of the function f(x) = 2 cos πx:

A) R

B) [-π,π]

C)[-2,2]

D) [-1,1]

PLEASE I NEED HELP IM REALLY BAD AT FINDING RANGES , I WILL MARK BRAINLIEST!!!

Respuesta :

19-07-2021

Answer:

A) R

Step-by-step explanation:

f(x) = 2 cos π x, but cos π = -1 therefore

f(x) = -2x, this is a line that has the slope m= -2, and goes trough the origin

the range is given by all the values of y so is R

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