求等式的题

XiJuan

对于所有的k和m,k*(l+m)=(k*l)+(k*m)吗？
（1）当k取某些数时，k*l与l*k不相等；
（2）*代表加法

sdcar2010

If condition 1 is true, then the operation of star(*) is not commutative. Then star is not multiplication. Then the equation will not hold.  Sufficient.

If condition 2 is true, then the operation is multiplication, and it is not distributive. The equation will not hold. Sufficient.


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