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(2002•哈尔滨)下列运算中,正确的是A.2a+3b=5abB.3a-2=C.(-x)5...
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(2002•哈尔滨)下列运算中,正确的是( )
A.2a+3b=5ab
B.3a
-2=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABUAAAAqCAYAAABcOxDuAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEySURBVEhL7ZaLDQIxCIY7WXfqOl2mo3QULPRF
H0pzYow5L7lo4vkd/PxADXzgMh9gwheh0YM1Fnw8y0uONDgwxqRbE0rBBXB/qF6hbq4pGR99mm8X
5AaQzS8zlifuDq0F0PpEge+u6QUbin95Q9MI3tZOc2mM9+syNHrXdlZwCW491BV2GTpoQPOhR6sD
pR2mDU2ROrYWVCINvuup0lHR22XG5kjbgSFV8WQKlyoh0La0A/jyPUGTyA2Egp9Nd7IR2wj8BGMg
xuavHPQZ9FVbDYXCdPbp5wwomjB6cgcvUNZys6bDia88J+g+Wqpszi5+hnAGytN/34uw+HSQAF0x
RIUvkY+Uq/kZaC4avZANjmfFmqBjJBxKwFQsKXXqqPrw9rTMmgJh1ZsSWKX3Zxl+B/oA8iPAX3e8
JqEAAAAASUVORK5CYII=
)
C.(-x)
5•(-x)
3=-x
8D.(-1)=1
相关试题
-
(2002•哈尔滨)下列运算中,正确的是( )
A.2a+3b=5ab
B.3a-2=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABUAAAAqCAYAAABcOxDuAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEySURBVEhL7ZaLDQIxCIY7WXfqOl2mo3QULPRF
H0pzYow5L7lo4vkd/PxADXzgMh9gwheh0YM1Fnw8y0uONDgwxqRbE0rBBXB/qF6hbq4pGR99mm8X
5AaQzS8zlifuDq0F0PpEge+u6QUbin95Q9MI3tZOc2mM9+syNHrXdlZwCW491BV2GTpoQPOhR6sD
pR2mDU2ROrYWVCINvuup0lHR22XG5kjbgSFV8WQKlyoh0La0A/jyPUGTyA2Egp9Nd7IR2wj8BGMg
xuavHPQZ9FVbDYXCdPbp5wwomjB6cgcvUNZys6bDia88J+g+Wqpszi5+hnAGytN/34uw+HSQAF0x
RIUvkY+Uq/kZaC4avZANjmfFmqBjJBxKwFQsKXXqqPrw9rTMmgJh1ZsSWKX3Zxl+B/oA8iPAX3e8
JqEAAAAASUVORK5CYII=
)
C.(-x)5•(-x)3=-x8
D.(-1)=1
-
(2002•哈尔滨)下列运算中,正确的是( )
A.2a+3b=5ab
B.3a-2=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABUAAAAqCAYAAABcOxDuAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEySURBVEhL7ZaLDQIxCIY7WXfqOl2mo3QULPRF
H0pzYow5L7lo4vkd/PxADXzgMh9gwheh0YM1Fnw8y0uONDgwxqRbE0rBBXB/qF6hbq4pGR99mm8X
5AaQzS8zlifuDq0F0PpEge+u6QUbin95Q9MI3tZOc2mM9+syNHrXdlZwCW491BV2GTpoQPOhR6sD
pR2mDU2ROrYWVCINvuup0lHR22XG5kjbgSFV8WQKlyoh0La0A/jyPUGTyA2Egp9Nd7IR2wj8BGMg
xuavHPQZ9FVbDYXCdPbp5wwomjB6cgcvUNZys6bDia88J+g+Wqpszi5+hnAGytN/34uw+HSQAF0x
RIUvkY+Uq/kZaC4avZANjmfFmqBjJBxKwFQsKXXqqPrw9rTMmgJh1ZsSWKX3Zxl+B/oA8iPAX3e8
JqEAAAAASUVORK5CYII=
)
C.(-x)5•(-x)3=-x8
D.(-1)=1
-
(2002•哈尔滨)下列运算中,正确的是( )
A.2a+3b=5ab
B.3a-2=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABUAAAAqCAYAAABcOxDuAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEySURBVEhL7ZaLDQIxCIY7WXfqOl2mo3QULPRF
H0pzYow5L7lo4vkd/PxADXzgMh9gwheh0YM1Fnw8y0uONDgwxqRbE0rBBXB/qF6hbq4pGR99mm8X
5AaQzS8zlifuDq0F0PpEge+u6QUbin95Q9MI3tZOc2mM9+syNHrXdlZwCW491BV2GTpoQPOhR6sD
pR2mDU2ROrYWVCINvuup0lHR22XG5kjbgSFV8WQKlyoh0La0A/jyPUGTyA2Egp9Nd7IR2wj8BGMg
xuavHPQZ9FVbDYXCdPbp5wwomjB6cgcvUNZys6bDia88J+g+Wqpszi5+hnAGytN/34uw+HSQAF0x
RIUvkY+Uq/kZaC4avZANjmfFmqBjJBxKwFQsKXXqqPrw9rTMmgJh1ZsSWKX3Zxl+B/oA8iPAX3e8
JqEAAAAASUVORK5CYII=
)
C.(-x)5•(-x)3=-x8
D.(-1)=1
-
(2002•哈尔滨)下列运算中,正确的是( )
A.2a+3b=5ab
B.3a-2=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABUAAAAqCAYAAABcOxDuAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEySURBVEhL7ZaLDQIxCIY7WXfqOl2mo3QULPRF
H0pzYow5L7lo4vkd/PxADXzgMh9gwheh0YM1Fnw8y0uONDgwxqRbE0rBBXB/qF6hbq4pGR99mm8X
5AaQzS8zlifuDq0F0PpEge+u6QUbin95Q9MI3tZOc2mM9+syNHrXdlZwCW491BV2GTpoQPOhR6sD
pR2mDU2ROrYWVCINvuup0lHR22XG5kjbgSFV8WQKlyoh0La0A/jyPUGTyA2Egp9Nd7IR2wj8BGMg
xuavHPQZ9FVbDYXCdPbp5wwomjB6cgcvUNZys6bDia88J+g+Wqpszi5+hnAGytN/34uw+HSQAF0x
RIUvkY+Uq/kZaC4avZANjmfFmqBjJBxKwFQsKXXqqPrw9rTMmgJh1ZsSWKX3Zxl+B/oA8iPAX3e8
JqEAAAAASUVORK5CYII=
)
C.(-x)5•(-x)3=-x8
D.(-1)=1
-
下列运算正确的是( )
A.2a+3b=5ab
B.3a-2a=1
C.a•a=a2
D.a6÷a2=a3
-
下列运算正确的是( )
A.2a+3b=5ab
B.(a+1)2=a2+1
C.4a6÷(-2a3)=-2a2
D.(3a3)3=27a9
-
(2005•聊城)下列运算正确的是( )
A.2a+3b=5ab
B.(a+1)2=a2+1
C.4a6÷(-2a3)=-2a2
D.(3a3)3=27a9
-
下列运算中正确的是( )
A.3a+2b=5ab
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAAAbCAYAAADf98keAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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==
)
C.3a•2a=6a
D.(-a3)2=a6
-
在下列运算中,正确的是( )
A.3a+2b=5ab
B.3a×2b=5ab
C.3a+2a=5a
D.3a-2a=1
-
(2007•随州)下列计算,结果正确的是( )
A.2a+3b=5ab
B.(a3)2=a2
C.2a•(-3a2)=-6a3
D.