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Then Sn can take what values among:

1056, 1088, 1120, 1332

- Thread starter klen
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- #1

- 41

- 1

Then Sn can take what values among:

1056, 1088, 1120, 1332

- #2

tiny-tim

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simplest way is probably to do the sum for 4m-3,4m-2,4m-1,4m (only) first …

what do you get?

- #3

HallsofIvy

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Did you, for example, notice that every time n increases by 1, the sum has 4 new terms, two negative and two positive? Do you notice that for n= 1, so there are 4 terms, the sum is 20= 4(5) and when n= 2, so there are 8 terms, the sum is 72= 8(9)?

Then Sn can take what values among:

1056, 1088, 1120, 1332

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