-(-1)2n=______,若am=2,an=3,则am+n=______,a2n=______.
题型:填空题难度:一般来源:不详
-(-1)2n=______,若am=2,an=3,则am+n=______,a2n=______. |
答案
-(-1)2n=-1; am+n=am•an=2×3=6; a2n=an•an=3×3=9. 故应填-1,6,9. |
举一反三
下列式子中结果为负数的是( )A.|-5| | B.-(-5) | C.(-5)2 | D.-|-5| |
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若|3a+4b-c|+(c-2b)2=0,则a:b:c=______. |
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