设R={,,,},则∣s(R)∣=多少?

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设R={,,,},则∣s(R)∣=多少?设R={,,,},则∣s(R)∣=多少?设R={,,,},则∣s(R)∣=多少?s(R)={,,,,,}故|s(R)|=6

设R={,,,},则∣s(R)∣=多少?
设R={,,,},则∣s(R)∣=多少?

设R={,,,},则∣s(R)∣=多少?
s(R)={,,,,,}
故|s(R)|=6