题目内容
填表:
根据上表填空:
(1)当a>1时,a2>a;
(2)当a>1时,a3______a2;
(3)当0<a<1时,a2______a;
(4)当0<a<1时,a3______a2.
| a | -1 | 0 | 1 | 2 | |
| a2 | 1 | ||||
| a3 | -1 |
(1)当a>1时,a2>a;
(2)当a>1时,a3______a2;
(3)当0<a<1时,a2______a;
(4)当0<a<1时,a3______a2.
填表略.经过减法运算得到:
(1)当a>1时,a2-a=a(a-1)>0;
(2)当a>1时,a3-a2=a2(a-1)>0;
(3)当0<a<1时,a2-a=a(a-1)<0;
(4)当0<a<1时,a3-a2=a2(a-1)<0.
(1)当a>1时,a2-a=a(a-1)>0;
(2)当a>1时,a3-a2=a2(a-1)>0;
(3)当0<a<1时,a2-a=a(a-1)<0;
(4)当0<a<1时,a3-a2=a2(a-1)<0.
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