Đưa dạng toàn phương về chính tắc bằng phép biến đổi trực giao: f = 〖4x〗_1^2 〖+5x〗_2^2 〖+3x〗_3^2 〖-4x〗_1 x_2 〖-4x〗_1 x_3

When drawing a trend line for a series of data on a scatter plot, which of the following is true? a. there should be an equal number of data points on either side of the trend line. b. all the data points should lie on one side of the trend line. c. the trend line should not intersect any data point on the plot. d. the trend line must connect each data point on the plot.

Ateam has p points. p = 3w + d w = wins d = draws a) a football team has 5 wins and 3 draws. how many points does the team have?

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.