Câu 1. Tìm tập xác định của hàm số y x = + 2021cot 2 2022 . A. \ 2 D k     = +     . B. \ 2 D k   =     . C. \ 4 2 D k     = +     . D. D =

i think the answer is d im not sure

answer is c

step-by-step explanation:

81/12=324/x

x=48

(a) x intercepts: -6 and 2

you can obtain these by solving the equation 0=x^2 +4x-12 using your favorite quadratic formula. but it is easy to verify -6 and 2 indeed satisfy this equation.

(b) y intercept: -12

this is obtained by setting x=0: 0^2+4*0-12 = -12

(c) the minimum value is: -16 (this is the vertex)

you can get the vertex by rewriting the equation into the form:

there is no global or local maximum as the function goes to infinity, so only in the limit sense: +infinity.