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Section 3: Functions 47
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Sample Case: Reciprocals. Calculate: ¼=.25.
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Press
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See Displayed
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Comment
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4 g1/x
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Reciprocal of 4.
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Naturally, you can use this value in another calculation. For example, to go on and calculate
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¼ is already calculated. We need only
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Press
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See Displayed
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Comment
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Reciprocal of 4.
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3 g1/x
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Reciprocal of 3.
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+
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Sum of reciprocals.
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g1/x
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Answer reciprocal of sum.
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Sample Case: Factorial. Calculate the number of ways 6 people can line up for a photograph.
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Press
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See Displayed
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Comment
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6 gn!
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Answer.
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Sample Case: Exponential. In the preceding section we calculated the successive terms
of a geometric series to find that after 6 periods, $1000 invested at 10% grows to $1771.56. Using the
gyX function, the same result is obtained by evaluating the following:
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1000 (1.10)6
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Press
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See Displayed
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Comment
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1000 ENTER
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Original amount
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1.10 ENTER 6 gyX
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(1.10)6
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×
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Answer.
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