下列单项式中,系数与次数相等的是( )a.3x3y3 b.3x3y c.3xy2
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![下列单项式中,系数与次数相等的是( )a.3x3y3 b.3x3y c.3xy2](/uploads/image/z/5536170-18-0.jpg?t=%26%23160%3B+%E4%B8%8B%E5%88%97%E5%8D%95%E9%A1%B9%E5%BC%8F%E4%B8%AD%2C%E7%B3%BB%E6%95%B0%E4%B8%8E%E6%AC%A1%E6%95%B0%E7%9B%B8%E7%AD%89%E7%9A%84%E6%98%AF%EF%BC%88+%EF%BC%89a.3x3y3%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B+b.3x3y%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3Bc.3xy2%26%23160%3B%26%23160%3B%26%23160%3B%26%23)
下列单项式中,系数与次数相等的是( )a.3x3y3 b.3x3y c.3xy2
下列单项式中,系数与次数相等的是( )
a.3x3y3 b.3x3y c.3xy2 d.xy
下列单项式中,系数与次数相等的是( )a.3x3y3 b.3x3y c.3xy2
答案:C.次数等于所有未知数次方的和.例如:3XY2的次数就是X的次数1加上Y的次数2.
C
3x3y3=3(xy)^3,系数为3,次数也为3,所以选A
X为1次 Y为2次。加起来是3次 系数也为3 选C
A项6次 系数为3
B项4次 系数为3
D项2次 系数为1