已知2的x次方等于9,2的y次方=8/3,则x+2y=
问题描述:
已知2的x次方等于9,2的y次方=8/3,则x+2y=
答
2∧x=9x=log₂92∧y=8/3y=log₂﹙8/3﹚x+2y=log₂9+2log₂﹙8/3﹚=log₂9+log₂﹙8/3﹚²=log₂[9×﹙8/3﹚²]=log₂8²=6...
已知2的x次方等于9,2的y次方=8/3,则x+2y=
2∧x=9x=log₂92∧y=8/3y=log₂﹙8/3﹚x+2y=log₂9+2log₂﹙8/3﹚=log₂9+log₂﹙8/3﹚²=log₂[9×﹙8/3﹚²]=log₂8²=6...