高中数学题求帮助~
答案如图:不知道对不对,希望对你有帮助,谢谢
log6,√24=log6,24^(1/2)=(1/2)log6,24=(1/2)log(3,24)/log(3,6)
=(1/2)(log3,3*8)/log(3,3*2)
=(1/2)(log3,3+log3,8)/(log3,3+log3,2)
=(1/2)(1+log3,2³)/(1+log3,2)
=(1/2)(1+3log3,2)/(1+log3,2)
=(1/2)(1+3a)/(1+a)
=(1+3a)/(2(1+a))
=(1+3a)/(2a+2)
=(3a+1)/(2a+2)
故选A
热门标签: