配套习题- 逆用幂的运算性质求值 -【青果学院】

1/5单选题

难度：

1.若m•2³=4³，则m等于（）

A	2
B	4
C	6
D	8

正确答案：RA==

6Kej77yabSYjODIyNjsyPHN1cD4zPC9zdXA+PTQ8c3VwPjM8L3N1cD7vvIw8YnI+bSYjODIyNjsyPHN1cD4zPC9zdXA+PTI8c3VwPjY8L3N1cD7vvIw8YnI+bT0yPHN1cD42PC9zdXA+w7cyPHN1cD4zPC9zdXA+PTI8c3VwPjM8L3N1cD49OO+8jDxicj7mlYXpgIlELiA=

2/5单选题

难度：

2.若3×9^m×27^m=3²¹，则m的值为（）

A	3
B	4
C	5
D	6

正确答案：Qg==

6Kej77yaMyYjODIyNjs5PHN1cD5tPC9zdXA+JiM4MjI2OzI3PHN1cD5tPC9zdXA+PTMmIzgyMjY7MzxzdXA+Mm08L3N1cD4mIzgyMjY7MzxzdXA+M208L3N1cD49MzxzdXA+MSsybSszbTwvc3VwPj0zPHN1cD4yMTwvc3VwPu+8jDxicj7iiLQxKzJtKzNtPTIx77yMPGJyPuino+W+l209NC4gPGJyPuaVhemAiUIuIA==

3/5单选题

难度：

3.已知x^m=3，xⁿ=2，则x^3m+2n的值是（）

A	31
B
C	23
D	108

正确答案：RA==

6Kej77ya5Y6f5byPPe+8iHg8c3VwPm08L3N1cD7vvIk8c3VwPjM8L3N1cD4mIzgyMjY777yIeDxzdXA+bjwvc3VwPu+8iTxzdXA+Mjwvc3VwPj0zPHN1cD4zPC9zdXA+JiM4MjI2OzI8c3VwPjI8L3N1cD49MjfDlzQ9MTA4LiA8YnI+5pWF6YCJRC4g

4/5单选题

难度：

4.计算：(−

)²⁰¹⁴×(−2

)²⁰¹⁴=（）

A	-1
B	1
C	0
D	2014

正确答案：Qg==

6Kej77yaKCYjODcyMjs8aW1nIHdpZHRoPTE1IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzRCL0UxL3JCQUNFMU4xaDdHd21XU2tBQUFCU1V3QTAyUTAwNC5wbmciPik8c3VwPjIwMTQ8L3N1cD7DlygmIzg3MjI7MjxpbWcgd2lkdGg9OCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC80Qi9FMS9yQkFDRTFOMWg3SER4Rnc1QUFBQkxVSHhITW83MDAucG5nIj4pPHN1cD4yMDE0PC9zdXA+PVstPGltZyB3aWR0aD0xNSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC80Qi9FMS9yQkFDRTFOMWg3R3dtV1NrQUFBQlNVd0EwMlEwMDQucG5nIj7Dl++8iC08aW1nIHdpZHRoPTE1IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzBGL0Q5L3JCQUNGRk4xaDdIVHlJRHJBQUFCVFF2NEhZODg1Ny5wbmciPu+8iV08c3VwPjIwMTQ8L3N1cD49MS4gPGJyPuaVhemAiUIuIA==

5/5单选题

难度：

5.若n为正整数，且x²ⁿ=7，则（3x³ⁿ）²-4（x²）²ⁿ的值为（）

A	833
B	1225
C	2891
D	3283

正确答案：Qw==

6Kej77ya77yIM3g8c3VwPjNuPC9zdXA+77yJPHN1cD4yPC9zdXA+LTTvvIh4PHN1cD4yPC9zdXA+77yJPHN1cD4ybjwvc3VwPjxicj49Oe+8iHg8c3VwPjJuPC9zdXA+77yJPHN1cD4zPC9zdXA+LTTvvIh4PHN1cD4ybjwvc3VwPu+8iTxzdXA+Mjwvc3VwPjxicj49OcOXNzxzdXA+Mzwvc3VwPi00w5c3PHN1cD4yPC9zdXA+PGJyPj0yODkxLiA8YnI+5pWF6YCJQy4g