If @ denotes one of the two arithmetic operation, addition or multiplication，and if k is an interger. what is the value of 3@k? 1)2@k=3 2)1@0=k 要求值，需要知道k和@代表的是加还是乘，所以我c了 可是最后答案居然是A 难道这个题不需要管@所代表的运算含义，只求出k值就行了？那似乎2）也可以啊，为什么不D呢？ 求助。。。 -- by 会员 菩提无树a (2011/8/17 15:00:37)
To answer, must determine @ and k.
2@k=3, @is either + or x, however, since k is an integer, therefore, @ cannot be x but must be + and k must be 1.
for b, 1@0=k, 1X0=0=K, integer, 1+0=1=k integer, therefore unable to determine what k is or what @ is. | 
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发表于 2011-8-17 15:00:37
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