分数指数幂题目 10
1.-3的1/3次方÷6的4/3次方的3/2次方2.½的½次方×二分之三的-½次方×¾的½次方描述的...
1.-3的1/3次方÷6的4/3次方的3/2次方
2.½的½次方×二分之三的-½次方× ¾的½次方
描述的可能不太清楚,望高手解答。求速度。 展开
2.½的½次方×二分之三的-½次方× ¾的½次方
描述的可能不太清楚,望高手解答。求速度。 展开
1个回答
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1
-[3^(1/3) / 6^(4/3)]^(3/2)=-[3^(1/3) / (6^4)^(1/3)]^(3/2)=-(1/3/6^4)^[(1/3)*(3/2)]
=-[1/(3*6^4)]^(1/2)=-√3/(36)
2
(1/2)^(1/2) * (3/2)^(-1/2) *(3/4)^(1/2)
=(1/2)^(1/2) *(2/3)^(1/2)*(3/4)^(1/2)=[(1/2)*(2/3)*(3/4)]^(1/2)=(1/4)^(1/2)=1/2
-[3^(1/3) / 6^(4/3)]^(3/2)=-[3^(1/3) / (6^4)^(1/3)]^(3/2)=-(1/3/6^4)^[(1/3)*(3/2)]
=-[1/(3*6^4)]^(1/2)=-√3/(36)
2
(1/2)^(1/2) * (3/2)^(-1/2) *(3/4)^(1/2)
=(1/2)^(1/2) *(2/3)^(1/2)*(3/4)^(1/2)=[(1/2)*(2/3)*(3/4)]^(1/2)=(1/4)^(1/2)=1/2
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