When order matters, use... (How many different possibilities?)...
When order does NOT matter, use... (How many different possibilities?)...
There are 10 marbles in a bag: 1 red, 1 white, 1 yellow, 2 green, 2 blue, and 3 orange. (How many different possibilities?)
arithmetic summation formula
(a1(1-n^r)) / (1-n)
geometric summation formula
In a summation, when i or k is greater than 1... (fill in the blank) Take the normal answer of k=1 and n= the original n, and then find the same summation where k=1 and n is 1 less than the original given k. Then you _______ the summation with the different n from the summation with the original n to find the final answer.
Summation of k
Summation of k^2
Summation of k^3
limit = (a1)/(1-r)
geometric converging limit
When finding n for a series in order to find the series' summation, what type of geometric/arithmetic formulas can you plug the given numbers in to find n?
When finding n for a series in order to find the series' summation, what type of geometric/arithmetic formulas should you NOT use to plug in the given numbers in to find n?
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