We use summation rules to simplify our work. Read summation rules carefully; otherwise, it sounds like double talk! Note that we consistently use k as the symbol for a constant.
Rule 1: The summation of the sums of two or more variables equals the sum of their summations
Rule 2: The summation of a constant times the values of a variable is equal to the constant times the summation of the variable
Rule 3: The summation of a constant taken N times is the constant times N
Rule 4: The summation of the values of a variable plus a constant is equal to the summation of the values of the variable plus N times the constant
Rule 5: The summation of the values of a variable minus a Constant is equal to the summation of the values of the variable minus N times the constant
Instructions
If we have
what do we write before the summation sign?
Assign your answer to checkpoint_1
in the code editor.
If we have
what is the partial sum?
Assign your answer to checkpoint_2
in the code editor.