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(2009•三明)下列计算正确的是A.a2•a2=2a4B.(2a)2=4a2C.3+3-...
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(2009•三明)下列计算正确的是( )
A.a
2•a
2=2a
4B.(2a)
2=4a
2C.3+3
-1=-3
D.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACdSURBVDhP1ZIxDgQhCEU5l4XHsecm1hzEloNM
wVFY0F2TmTiJ2K3Ghvj8/yOgiwUAunXe4FX9WYN/gUUpgyIPvyHbQrk3Mg4LKRKfKJtdJBXbYduM
WUk8ZRRmnBnDMON62rJZAW3lO4plzot3dL0etltr/V5NoKle4/924anQHQz1OGxQMUVXf4fvYW7h
rpoUUj2D/V1XP1L+mdqFP6uplFTsg5j9AAAAAElFTkSuQmCC
)
=±2
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