高中数学对数运算题集及.pdfVIP

HKCEEMATHEMATICS|6.2Logarithms|P.1

1.1990/II/5

1

pq

If2=10,3=10,expresslogintermsofpandq.

6

11

A.−p−qB.C.D.pqE.p+q

pqpq

2.1991/II/34

Iflogx:logym:n,thenx

m

mymlogy

A.B.(m−n)yC.m−n+yD.ynE.

nn

3.1992/II/5

1

Iflog10b1log10a,thenb=

2

a

aa

D.E.1

A.10aB.10C.5a

22

4.1993/II/8

Iflog(pq)logplogq,then

A.pq1B.pqC.pqD.pq1E.pq−1

q−1q1qq

5.1994/II/34

Iflog2aandlog9b,thenlog12

bb211

A.2a+B.2a+C.2a+bD.a2+b2E.a2b2

3233

6.1995/II/43

Ifthegeometricmean