The Summation Function (∑) - HP 17bll+ User Manual

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To do the calculation:
Keys:
I
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27500 
2 
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The Summation Function (∑)
The Σ function does summation calculations in an equation:
 counter variable  starting value  ending value  step size 
algebraic expression 
The counter variable takes on a series of values, beginning with the
starting value , and incrementing according to the step size , until it
passes the ending value . For each value of the counter, the algebraic
expression is evaluated, and the value is added to the previous value.
The Σ function returns the final summation.
For example, when the equation:
      
is solved for SERIES , the counter I runs from 1 through 6 in steps of one─
that is, 1, 2, 3, 4, 5, 6. For each value I , the expression  is
176 12: The Equation Solver
, then enter the equation:
Display:
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


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               
Description:
Stores, verifies, and
creates menu labels for
the equation.
Stores old salary.
Stores rating.
Calculates new salary.