S=log(1/2)[1-4/(t＋2)^2] (t≥1)的单调性用定义怎么求

S=log(1/2)[1-4/(t＋2)^2] (t≥1)的单调性用定义怎么求 求大神指点,lingo出现错误代码11,这是为什么?model:!目标函数;min=(0.005*((@log(1+k))^2+(@log(1+2*k))^2+(@log(1+3*k))^2+(@log(1+4*k))^2+(@log(1+5*k))^2))!/(@log(1+k)+@log(1+2*k)+@log(1+3*k)+@log(1+4*k)+@log(1+5*k));!约束条件;(@log log(2)5×log(5)81×log(3)4＋In√e.还有(log(2)3＋log(4)9)(log(3)4＋1／2log(3)2) f(x)=[log2(x/8)][log(1/2)(4/x)]值域令log(1/2)x=t∈[-3,1/2] log计算问题原始式子为(1+r)^t = FV/PV如何转换到 t*log(1+r) = log FV/PVt=log(FV/PV)/log(1+r)我是这样想的 (1+r)^t = log (1+r)(t)为什么t 提出来 FV/PV前面要加log吗?还有log6(2)为什么等于1log6(3)为什么等于1,怎么 化简2log`5(10)+log`3(0.25）+log`1/5(125)=(2) log`2(根号2）+log`9(27）+（1/4)^log`4(1/16) 注意 `为下角标 log 9 X/Y=1/2(log 3 X - log 3 Y) log 9 X/Y=1/4 3log 3 X =2log 3 Y find X and Y 1/log（2）x+1/log（3）x+1/log（4）x=1,x=? [log(3)3^1/2]^2+log(0.25)1/4+9log5根号5-log（根号3）1=? 计算：1/[log(2)3]+1/[log(5)3]=? log(X+5)+log(X+2)=1 log(27)32 × log(64)27+log(9)2 × log(4)根号27=?log(27)32 × log(64)27+log(9)2 × log(4)根号27=? 已知lg2=0.301,lg3=0.477,求（1）log(2)1000,(2)log(5)0.5,(3)log(9)8,(4)log(1/2)1/3 已知log(a)x=1,log(b)x=2,log(c)x=4,则log(abc)x=? 已知log a x=2,log b x=1,log c x=4,求log abc x 的值 log(10)(25/9)减log(10)(7/4)减log(10)(1/9)加1/2log(10)(49) (log(2)9+log(4)1/9)乘以(log(3)2+log(9)0.5) 括号里是底数.计算这道题. 设y=log(a)((x-3)/(x+3)) (a＞0,a≠1)的定义域为[s,t）,值域为（log(a)((at-a)),log(a)((as-a))].(1)求证s＞3(2)求a的取值范围问是为了完成百度任务,我觉得这道题有一定难度,其实我已经做出来了,你的答案不