1、多项式概念练习题1.下列代数式是多项式的有_(1)b-b;(2) ;(3) ;(4) ;(5)mn;(6) a (7)2.6-3; (8) ; (9)2612x aa5312x3ab5c; (10)y2;(11)5b 2cx; (12)z+x-2; (13) m3n4; (14)5;(15)(a-b) 2 (16)12.下列代数式中,多项式共有_个(ab-5)3,3xy,2a+1-3y 5,3ax 2y2,1-y,4x,x 2+y2+xy-6,a2,0,7-2,3, ,a, , (3-2) 254yx3.在代数式: ,m-3,-2 2, ,2b 2,ax 2ay2, , -x2+6y-5yxz
2、4,0,-n3xy9x2, ,3x,a 2+2a-1+ x2yz, ,3-2 中,多项式的个数为_个8yx3 y54.下列代数式中,多项式共有_个3x, , , , , , ,-6,-76 , ,x+y-z-1,xyz,3z,6a 2bcd3,7x-y-z,1+0,31x2y3 ba12 x3abc55.下列代数式(1)-1, (2) 5, (3) , (4) ,(5) , (6)3a+b,(7)0,(8)m, (9)y2612c(3y-1)2, (10)23-10,(11) 3x 5-2y6-4z7-5,(12)5-1-6x-5y中,是多项式的是_6.判断下列式子哪些是多项式,哪些是整式?-
3、a 2+1 x3y (-5)(-6)7(-8) 3x+2-y=0 -5x26y3(-4z 2) 1 2 3 4 5 5 6 7(2x-3y)4 5x-4y=6z-1 - 8 (2a-3b-4z)2m x=0 8 9 102y11 32x4z12 5713 14x -5 (-5-6)x(2a-3) -(2a+3b) 2 0 1- x3y5z815 416 17 18 19 ab20 21 22 23-5x2-6xyz-7x3-1-3x2y5 4a5 m 3x-3x 3x-2024 25 26 27 287.判断下列式子哪些是单项式,哪些是整式?2-x 32-25 x4y5z 3x-a=5 -6a23b3(-4c 4) -56-1 1 2 3 4 6y2)( 5 6 7(5a-6b)4m 7a-5b=6c-1 - 3 3x-2y-5z 8 9 10ab11 cb3a12 57813 14 65(-5-6)a(3b-1) (a-b) 2 567 0 4b 8a x2yz 15 16 17 18 19 20 46821 22 7315a2b3z48 -21-5x2-6xyz-7x3-1-3x2y5 -2x3+5xyz4-8x2-3-7x6y5z -2m x-x 3x-23 24 25 26 27 2820