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31.07.2019 •
Mathematics
You are having a discussion about sequences with your classmate. she insists the the sequence 2,3,5,8,12 must be either arithmatic or geometric. is she correct or incorrect? explain.
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Ответ:
.. a[n] = (n*(n -1))/2 +2
First differences are increasing, so the sequence will not be arithmetic. An arithmetic sequence has constant first differences.
Second differences are constant, so the sequence will not be geometric. A geometric sequence will have first-, second-, third-differences, and those to any level, that have the same constant ratio as the terms of the original sequence.
Ответ:
An algebraic expression is a mathematical expression that consists of variables, numbers, and operations. We can use algebraic expressions to represent unknown number situations involving addition, subtraction, multiplication, and division.
Step-by-step explanation: