本课配套习题挑战模式3/5
单选题
难度系数:
3.
已知P是线段AB的黄金分割点,且PA>PB、如果S1表示以PA为一边的正方形的面积,S2表示长为AB、宽为PB的矩形的面积,则S1与S2之间的大小关系是
( )
A: S1=S2 |
B: S1>S2 |
C: S1<S2 |
D: S1与S2的大小关系不能确定 |
一次做对,真牛!
+5奖励规则>
- 提示1:PHA+5qC55o2u6buE6YeR5YiG5Ymy55qE5qaC5b+155+l77yaQVA8c3VwPjI8L3N1cD7vvJ1QQsK3QULvvIzlj5jlvaLlkI7msYLop6M8L3A+
- 答案:QQ==
PGRpdj7op6PvvJriiLVBUDxzdXA+Mjwvc3VwPu+8nVBCwrdBQu+8jOWPr+W+l+mdouenr+ebuOetiTwvZGl2Pg==
本课配套习题挑战模式4/5
单选题
难度系数:
4.
如果线段上一点P把线段分割为两条线段PA,PB,当PA2=PB•AB,即PA≈0.618AB时,则称点P是线段AB的黄金分割点,现已知线段AB=10,点P是线段AB的黄金分割点,如图所示,那么线段PB的长约为( )
A: 6.18 |
B: 0.382 |
C: 0.618 |
D: 3.82 |
一次做对,真牛!
+5奖励规则>
- 提示1:PHA+5qC55o2u6buE6YeR5YiG5Ymy54K555qE5qaC5b+16aaW5YWI6K6h566X5Ye6QVDnmoTplb/vvIzlho3ov5vkuIDmraXorqHnrpflh7pQQueahOmVvzwvcD4=
- 答案:RA==
PGRpdj7moLnmja7popjmhI/lvpfvvJpBUOKJiDAuNjE4w5cxMD02LjE477yM5YiZUEI9QUItQVA9MTAtNi4xOD0zLjgyLjxicj7mlYXpgIlELjwvZGl2Pg==
本课配套习题挑战模式5/5
单选题
难度系数:
5.
已知点M将线段AB黄金分割(AM>BM),则下列各式中不正确的是( )
A: AM:BM=AB:AM |
B: AM=AB |
C: BM=AB |
D: AM≈0.618AB |
一次做对,真牛!
+5奖励规则>
- 提示1:PHA+5qC55o2u6buE6YeR5YiG5Ymy55qE5a6a5LmJ5Yik5patPC9wPg==
- 答案:Qw==
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