Which of the following is not a true statement about pi?

a. the ratio of the circumference of a circle to its diameter

b. approximated to be 3.14

c. approximated to be 22/7

d. the ratio of the radius of a circle to its circumference

Use sigma notation to represent the following series for 9 terms.

Is there a direction u in which the rate of change of f(x, y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.

The value of x must be greater than what?