Cho hàm số f (x, y)= a) Tính vi phân cấp 1 của hàm số tại
b) Tính các đạo hàm riêng cấp 2 của hàm số tại
c) Chứng minh rằng không tồn tại

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.