Let f be defined as follows: x2-9 for x # 3, f(x) = %3D X-3 1 for x = 3 Which of the following are true about f? I. lim f(x) exists X-3 II. f(3) exists III. f(x) is continuous at x = 3 OLl, and II Ol and II Il only

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.