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(2)若y=lg，則10^y=________，y=________；

(3)若y=x³(x＞0且x≠1)，則log_xy=________.

log₂16=________，log₂1=________，log₂=________，

log₂=________，log₂=________.

A.4                                                                 B.5

C.3                                                                 D.

A.x≠1                                                            B.x＞1

C.x≠2                                                            D.x＞1且x≠2

A.log₂N=a                                                       B.log₂a=N

C.log_Na=2                                                        D.log_aN=2

A.10⁰=1與lg1=0                                             B.27=與log₂₇=－

C.log₃9=2與9=3                                          D.log₅5=1與5¹=5

(1)x=log₂₇；(2)logx=－4；(3)log_x8=－3.

(1)3^x=；(2)()^x=64；(3)()^x=；(4)5=.

(1)求f(x)單調(diào)遞增和遞減區(qū)間；

(2)畫出f(x)的圖象.