6△7=(6+3)×(7-5)=18
5△(6△7)=5△18=(5+3)×(18-5)=8*13=104
對于數(shù) a、b有這樣的要求,a△b =(a+3)×(b-5),請算出5△(6△7)等于多少?
對于數(shù) a、b有這樣的要求,a△b =(a+3)×(b-5),請算出5△(6△7)等于多少?
數(shù)學(xué)人氣：546 ℃時間：2020-09-30 05:37:43
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