65 followed by 129
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To determine the pattern in the series 17, 20, 14, -1, we can see that the difference between each consecutive number is not consistent. The sequence seems to be alternating between adding and subtracting numbers. Specifically, the pattern is +3, -6, -15. Following this pattern, the next number in the series would be obtained by subtracting 24 from -1, resulting in -25.
21
This series is of the function f(x) = x2+1, starting with x=0.The next number in the series is 26. The number after that is 37.
24
14