(1)解方程:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd61987e553decceb74f9753340b669.png)
(2)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd61987e553decceb74f9753340b669.png)
(2)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9811c8eb619b7d4475ea2fa47422f1.png)
更新时间:2022-04-09 09:58:08
|
相似题推荐
解答题-问答题
|
较易
(0.85)
名校
【推荐1】(1)已知:
,求
;
(2)解不等式:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74d711fb21b7851fe66b6daa3c88bd52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)解不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86193ac53839aeb939aeb893383c7de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a759fb1278572f25a2f4d36a887656a8.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐2】已知
二项展开式中,第4项的二项式系数与第3项的二项式系数的比为
.
(1)求
的值;
(2)求展开式中
项的系数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e25fb145550443f5ce907c87db1f2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29300926800e5382f756abaef6359826.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)求展开式中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d800f03de80068a1172beac3a2c75587.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】设n为给定的不小于3的正整数,数集P={x|x≤n,x∈N*},记数集P的所有k(1≤k≤n,k∈N*)元子集的所有元素的和为Pk.
(1)求P1,P2;
(2)求P1+P2+…+Pn.
(1)求P1,P2;
(2)求P1+P2+…+Pn.
您最近一年使用:0次