Help in Entering Inequalities To enter an inequality, you can use your computer keyboard interchangably with a calculator keypad.
Entering Inequalites in x and y (or X and Y)
You can use parentheses, Terms in x may be entered as numbers (coefficients) times powers in x. You can use "*" for multiplication, or in the case of a number times x, you can abbreviate, say,"3*x" by "3x" but not "x3"; also, "x*x" cannot be abbreviated to "xx". Coefficients may be entered as integers (like 2 or Use pi for π (approximately 3.14) and e for the base e (approximately 2.72) of natural logarithms. When entering any function, like sqrt for the square
root, the argument (term in x) following the name needs to be
enclosed in paired parentheses. So, "sqrtx" is incorrect,
as is "sqrt(x", but "sqrt(x)" is correct. More Information For further illustrations of valid input, see how inequalities are entered in Examples of Inequalites in One Variable and Examples of Inequalites in Two Variables.
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