条件变为alg2+blg5=clg2+dlg5=1.
alg2+blg5-1=0,alg2-lg2+blg5-lg5=0,(a-1)/(b-1)=-lg5/lg2.
同理(c-1)/(d-1)=-lg5/lg2.即 ,(a-1)/(b-1)=(c-1)/(d-1)
A对.
已知2^a5^b=2^c5^d=10,则下列各式中正确的是?
已知2^a5^b=2^c5^d=10,则下列各式中正确的是?
A.(a-1)(d-1)=(b-1)(c-1)
B.(a-1)(b-1)=(d-1)(c-1)
C.(a+1)(d+1)=(b+1)(c+1)
D.(a+1)(b+1)=(d+1)(c+1)
一楼那么说的话。ABCD都对、
A.(a-1)(d-1)=(b-1)(c-1)
B.(a-1)(b-1)=(d-1)(c-1)
C.(a+1)(d+1)=(b+1)(c+1)
D.(a+1)(b+1)=(d+1)(c+1)
一楼那么说的话。ABCD都对、
数学人气:885 ℃时间:2020-03-30 07:09:21
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