8.w=2，2(0+#)+ 1/3？ = 1/2? +k？ , then 2#= 1/6? +k？ , then # =112+k/2? ，0 & lt# & lt 1/2? ,#= 1/ 12

10.P(A)=C(4，5)/C(7， 10)= 5/( 10 * 9 * 8/3 * 2 * 1)= 5/( 10 * 3 * 4)= 1/24

1 1 . f(X)= SIN(2X- 1/3？ )+ 1”log(2，t)，f(x)min =- 1+ 1 = 0 & gt； =log(2，t)，log(2， 1)>=log(2，t)，0 & ltt = & lt 1

13.f (x) = f (x+4), t = 4, g (x) = 0, f (x) = log {a, (x+2)}, there must be one, there must be one, and there is only one problem, that is, x=6. log{a，8}， 1 & lt； a & lt2