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Section 6: Functions82
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Squaring
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To square a number in the X-register, execute the
X2 and when you execute the function
from the display the name is X 2 (using the up
arrow, the shifted function on the ENTER key, in
ALPHA mode).
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Keyboard execution: X2
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Display execution: X 2
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For example, find the square of 27 using the keyboard
X2 function:
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Now, find the square of that number using the display execution form:
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Using Pi
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The value of pi accurate to 10 places (3.141592654) is provided as a
fixed constant in your HP-41C. Merely press
g
on the keyboard or execute
PI form the display whenever you need it in a calculation.
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Keyboard execution:
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Display execution: PI
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For example, calculate the surface of Ganymede, one of Jupiter’s 12 moons,
using the formula A = πd2. Ganymede has a diameter (d) of
3200 miles.
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