# What are the next three numbers in the sequence: 5, 10, 20, 40, 80?

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- What is the general term of an arithmetic sequence with #t_1 = 5# and #t_2 = 2#?
- How do you find an equation that describes the sequence #4, 8, 12, 16,...# and find the 13th term?
- How do you find the first three iterate of the function #f(x)=3x+5# for the given initial value #x_0=-4#?
- How do you tell whether the sequence -1,1,3,5,.... is arithmetic, geometric or neither?
- What is the 6th term of the geometric sequence 4, 20, 100,...?

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