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下列计算正确的是A.=-3B.()2=3C.=±3D.+=
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下列计算正确的是( )
A.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAbCAYAAAAOEM1uAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
=-3
B.(
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
)
2=3
C.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADASURBVDhPzZKxDcQgDEU9FwXj0LMJNYPQMkgK
RvlnAyEHByKXKpYiJZaf/7djwiSICLeeFTzLjzl6OZw8dNuDRax2b9iOsKThUyGS1yDtIZ97ONpW
XHBpRrAsv4W/lao2vCZotrKF2WeeV5T+h885h8O5ZXu8g35hwdRTNK1OTnMawwgUQsh1ThGUO/L7
FJatc1NZ1BmXRHZQ1Du4Hcj1r39hzhjuLOpL28Ms3XCHUyDlnsHSWNQfKbdZVtsebH8AdumEmLzs
7q4AAAAASUVORK5CYII=
)
=±3
D.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPzZNBEsUQEETnXBaOY+8m1g5iOwfJ
wlH6ZwRJ8ItklVSpQmn9picIg4+IsDT+iUf77R59XMz2zEB7xIw7x44e2nI+zrASZl5PxZG5OskN
0WtQdp+Ku0ClhFXnVsyWUKp45nyrH3ggjvDaokQnRIRgchtMJZRfs8fV8KVHpVUhhDR1iqDcluat
WBKu3ZIDe2iyPi0SweF+FUtA/SM58G98ZscV9xH28A1cNzenQMq9E8tF4v7KuVCsin81ApctPDAe
KwAAAABJRU5ErkJggg==
)
=
相关试题
-
下列计算中,正确的是( )
A.a6÷a2=a3
B.a•a3=a3
C.(-ab)2=a2b2
D.2a+3b=5ab
-
下列计算正确的是( )
A.
=-3
B.(
)2=3
C.
=±3
D.
+
=
-
下列计算正确的是( )
A.
=-3
B.(
)2=3
C.
=±3
D.
+
=
-
下列计算正确的是( )
A.3
×3
=3![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADISURBVDhP1ZOxDcQgDEU9FwXj0HsTagahZZAU
jPIPgwMhxyko3SFFigzP3/+TEBaLiLD1/IJX9XuN/gTOAbbmYREysD12DrZDp9U9OHEBGekW0Aac
ESyBWRq0K2Tt8gyrKqdGXMd/hOthG1Dy0ZXAqv4CbjZsiZsQnXpxvbf4GkL3sDSD4oJijPWcNwTj
j/o+wWVgUaIzJclAbQyJOkFTn2GpNJ8t7XFlk2dXNkX9G17/JhN8eAMy/h0s/UX9lXL/Zq9pryeu
1Q+uWIPqmKo/AAAAAABJRU5ErkJggg==
)
B.
=-3
C.2
+4
=6![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACySURBVDhPzZO5EcMgEEW3LgLKId9OiCmElEIU
UMq3lsOAjTRrRWaGhOH9Y5EIm0VEUO0reHf+eUb/D+dgxxxsQD4jK2MncAPmmjo4MTh9T0cBZwTb
n44xayjg4ZhYRCyCFNZ3HgJlcK3DT85VYgyPEF17AveWl0/zep1wd44xlnveEIw/apcbOPGuc0lQ
3Rc4B9jpR5mfbMnnzkvifh97FFrgwxuQ8c9g0RT3R849kBZ+AeaPnaoEN+d7AAAAAElFTkSuQmCC
)
D.
÷
=3
-
下列计算正确的是( )
A.
=-3
B.(
)2=3
C.
=±3
D.
+
=
-
下列计算正确的是( )
A.
=-3
B.(
)2=3
C.
=±3
D.
+
=
-
下列计算正确的是( )
A.
=-3
B.(
)2=3
C.
=±3
D.
+
=
-
下列计算正确的是( )
A.
=-3
B.(
)2=3
C.
=±3
D.
+
=
-
下列计算正确的是( )
A.a3•a3=2a3
B.a3÷a=a3
C.a+a=2a
D.(a3)2=a5
-
下列各式中计算正确的是( )
A.2a+3b=5ab
B.a•a3=a3
C.(a2)3=a5
D.(2a)3=8a3