wattpad+log+in

聂试薛4579log2000*50%+log20*30%+log4*20%=? 以10为底 -
咎哲修13061556855 ______ log2000*50%+log20*30%+log4*20% =log1000+log6+log80% =log1000*6*80% =log4800 =log48+2 =log48+2

聂试薛4579( - 1.8^0)*(1/3)^( - 2)+4^√9^3*√3+3log以3为底4的对数+log以2为底1/4的对数.计算 -
咎哲修13061556855 ______ 解析:(-1.8^0)*(1/3)^(-2)+4^√9^3*√3+3log(3,4)+log(2,1/4)=1*9+(4^√9)^3*√3+3ln4/ln3-2=9+4^9*√3+3ln4/ln3-2=7+262144√3+3ln4/ln3=7+262144√3+6ln2/ln3

聂试薛4579计算log2 6 - log2 3,lg5+lg2,log5 3+log5 1/3,log3 5 - log3 15 -
咎哲修13061556855 ______ log2 6-log2 3=log2 (6÷3)=log2 2=1,lg5+lg2=lg(5*2)=lg10=1,log5 3+log5 1/3=log5 (3*1/3)=log5 1=0,log3 5-log3 15=log3 (5÷15)=log 3 (1/3)=-1

聂试薛4579(log2)2+log2*log50+1g25值 -
咎哲修13061556855 ______[答案] [log2]2+log2*log50+log25 =log2(log2+log50)+log25 =log2(log(2*50))+log25 =2log2+log25 =log2^2+log25 =log(4+25) =2 背公式loga+logb=logab,nloga=loga^n

聂试薛4579(log4 3+log8 3)(log3 5+log9 5)(log5 2+log25 2)= -
咎哲修13061556855 ______ (log2 3/log2 4+log2 3/log2 8)(log3 5/log3 3+log3 5/log3 9)(log5 2/log5 5+log5 2/log5 25)=[(5log2 3)/6][(3log3 5)/2][(3log5 2)/2] 然后全部换成以2为底的对数得上式=(5/6)(3/2)(3/2)[(log2 3/log2 2)(log2 5/log2 3)(log2 2/log2 5)]=15/8

聂试薛4579计算 log6 2*log6 18+log6 81/4log3 6 -
咎哲修13061556855 ______ log6 2*log6 18+log6 81/4log3 6 =log6 2*log6 18+log6 3/log3 6=log6 2*log6 18+log6 3*log6 3=log6 2*log6 3+log6 2+log6 3*log6 3=[log6 2*log6 3+log6 3*log6 3]+log6 2=log5 3+log6 2=1

聂试薛4579计算:lg25+2lg2+2^1+log(2)(3) 主要log(2)(3)这个是怎么算的..计算:lg25+2lg2+2^1+log(2)(3) 主要log(2)(3)这个是怎么算的 -
咎哲修13061556855 ______[答案] 有个公式 a^[loga(N)]=N 原式=lg5²+2lg2+2^1*2^[log2(3)] =2lg5+2lg2+2*3 =2(lg5+lg2)+6 =2+6 =8

聂试薛4579log15(2)+log15(2/3)+log15(20) - log15(4)的值 -
咎哲修13061556855 ______ =log 15 (2*2/3*20 /4)=log 15(20/3)

聂试薛4579计算:3^log以3为底根号5+根号3^log为3为底1/5的值. -
咎哲修13061556855 ______[答案] 原式=√5+3^2log3(1/5) =√5+3^log3(1/5)² =√5+1/25

聂试薛4579计算:2log510+2log50.5+log20141+log7777. -
咎哲修13061556855 ______[答案] 2log510+2log50.5+log20141+log7777 =log5100+log50.25+0+1 =log525+1 =2+1 =3.