X is a random variable with expected value E(X).
Identify which of the following isnot a valid method for calculating the variance of X.
Consider a function f which has three variables, x1, x2 and x3.
Identify which of the following gives a correct definition of a partial derivative of the function f.
For -3.14 x +3.14, the graph of the function, sin x, is show below.
Identify the range of this defined function.
Calculate the total area enclosed by the x-axis and the function below, between x =1.5 and x = 2.
f(x) = 2x3
