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Example Questions
Example Question #11 : Sequences And Series
Rewrite this sum using summation notation:
Possible Answers:
Correct answer:
Explanation:
First, let's find a pattern for this sum. Each value has a difference of 3. If we know that the first value is 8, and that k will start at 1, and that each value must go up by 3, we can write the following:
Having determined the the rule for this sum, we can now determine what value it must end at by setting the rule function equal to the last value, 26.
Thus the summation notation can be expressed as follows:
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