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II. Function Keys
F. Exponential and Logarithmic Keys
1.
(reciprocal) will take the reciprocal of the expression. You can also take the reciprocal of a value that has already been calculated by pressing
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2.
(squaring key) will square a number or expression.
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3.
(square root) will take the square root of a nonnegative number or expression. If the expression is negative you will get an error message like the one shown below in the screen on the right.
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4.
(Common log - base 10) takes the logarithm base 10 of any positive number. If you enter a negative expression or zero, an error message will be displayed as shown in the figure on the right below.
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5.
(10 raised to a power) is a key you can use to raise 10 to a power. Press
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6.
(natural exponent) will raise the natural exponent e to any real power. If you want to just enter the value of e, press
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7.
(natural logarithm) will calculate the natural log (log base e) of any nonnegative expression. If a negative value or a zero is entered you will get an error message like the one shown below on the right.
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