问一道离散数学题If f og is one-to-one,does it follow that g is one-to-one?explain
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问一道离散数学题Iffogisone-to-one,doesitfollowthatgisone-to-one?explain问一道离散数学题Iffogisone-to-one,doesitfollo
问一道离散数学题If f og is one-to-one,does it follow that g is one-to-one?explain
问一道离散数学题
If f og is one-to-one,does it follow that g is one-to-one?explain
问一道离散数学题If f og is one-to-one,does it follow that g is one-to-one?explain
yes. 否则,如果存在不相等的 x1,x2 使得 g(x1)=g(x2)则 f(g(x1)=f(g(x2)). 则 f og is NOT one-to-one. 矛盾!
问一道离散数学题If f og is one-to-one,does it follow that g is one-to-one?explain
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