设x=log23,求2ˆ2x+2ˆ-2x+2 / 2ˆx+2ˆ-x
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/24 08:46:04
设x=log23,求2ˆ2x+2ˆ-2x+2/2ˆx+2ˆ-x设x=log23,求2ˆ2x+2ˆ-2x+2/2ˆx+2ˆ
设x=log23,求2ˆ2x+2ˆ-2x+2 / 2ˆx+2ˆ-x
设x=log23,求2ˆ2x+2ˆ-2x+2 / 2ˆx+2ˆ-x
设x=log23,求2ˆ2x+2ˆ-2x+2 / 2ˆx+2ˆ-x
x=log23
那么：2^x=3
2ˆ2x+2ˆ-2x+2 / 2ˆx+2ˆ-x
=3²+(1/3)²+2/3+1/3
=9+1/9+1
=10又1/9
2^x=3
2ˆ2x+2ˆ-2x+2 / 2ˆx+2ˆ-x
=3*3+(1/3)^2+2/3+1/3
=10+1/9
=91/9
x=log23
2^x=3
2ˆ2x+2ˆ-2x+2 / 2ˆx+2ˆ-x
=(2^x+2^-x)^2/ 2ˆx+2ˆ-x
= 2ˆx+2ˆ-x
=3+1/3
=3又1/3