Bài 4.6. Cho hàm khối xác suất đồng thời của biến ngẫu nhiên hai chiều (X, Y) có dạng
f(x, y) =k/xy
x = 2,4,6; y = 1,2,3.
a) Tìm hằng số k.
b) Tìm hàm khối xác suất biên của X và Y.
c. Hỏi X và Y có độc lập không? Vì sao?
​

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.

1 + (6 / x - 1)

step-by-step explanation:

divide using polynomial division.

answer: c

(2, -4)

goes 7 to the

(9, 4)

easy