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Chain Calculations - HP -28S Manual

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Chain Calculations
When you perform complicated calculations, the stack acts as tempo-
rary storage to hold intermediate results. This temporary storage acts
automatically. For example, suppose you want to calculate the total
resistance of the following circuit:
The formula for total resistance in this circuit is:
1
If R
1 ,
R
2 ,
and R3 have resistances of 8, 6, and 3 ohms respectively,
calculate the following:
Calculate as follows:
Put 8 on the stack.
8
[ENTER
I
1
8
+
1
+
6
3
You'll leave 8 on the stack until it's time to add it to the rest of the
calculation.
2: Doing Arithmetic
45

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