令2^x=t
2t²-9t+4=0
(t-4)(2t-1)=0
t1=4,t2=1/2
x1=2,x2=-1
指数方程[2^(2x+1)]-9·(2^x)+4=0的解集是________.
指数方程[2^(2x+1)]-9·(2^x)+4=0的解集是________.
答案和过程都要
答案和过程都要
数学人气:764 ℃时间:2020-05-08 04:06:31
优质解答
我来回答
类似推荐
猜你喜欢
- 1《骆驼祥子》中,祥子最大的梦想是啥米?
- 2英语翻译
- 3三猴子分一筐桃子,第一只分得总数的7分之2多2个,第二分到余下的3分之2少4个,第三分到20个.桃子几个?
- 426.The auto-man checked the car engine thoroughly but could find ______wrong with it.A.none B.nothing C.no D.no one
- 5Jack likes having lunch in the canteen(划线部分提问(划线部分是having lunch in the canteen))
- 6从游泳池出来时吹风为什么会感到冷?
- 7被子要打包 六1班打了9个包 还余下总数的5分之3 六2班继续打包 六2班打13个包还余下2个被子 问题见下面补
- 8If it was me,the outcome is not the same.if you insist memories will not do so的意思
- 9孔乙己是站着喝酒而穿长衫的唯一的人概括了孔乙己怎样的性格特点?
- 10()we met with difficulties,they came to help us