log2+1等于多少

鲁睿吴3353log2+log5怎么会等于1的.= =
华勇娟13246493393 ______ 是lg吧. lg2+lg5=lg(2*5)=lg10=1

鲁睿吴33532^log2 3 是多少 -
华勇娟13246493393 ______ 2^log2 3 =3

鲁睿吴3353(Log1+i(pi/2))+(Log2+i(5pi/6))=?多少? -
华勇娟13246493393 ______ (log1+i(π/2))+(log2+i(5π/6))=0+i(π/2)+log2+i(5π/6)=log2 + i(4π/3)

鲁睿吴3353数学:方程log2(x - 1)=2 - log2(x+1)的解为----
华勇娟13246493393 ______ 解:方程的右边=log2(4)-log2(x+1)=log2[4/(x+1)] x-1=4/(x+1) x²-1=4 x²=5 又因真数大于0 x-1>0,x+1>0 x>1 所以x=√5 把方程右边也变换成以2为底的形式,两边就能同时去对数

鲁睿吴3353不等式log2(x+1)≤log4(1 - x)的解集 -
华勇娟13246493393 ______ 先确定定义域 -1<x<1 log2(x+1)≤log4(1-x)=log2(1-x)^2 x+1≤(1-x)^2=x^2-2x+1 即x(x-3)>=0解得x<=0或x>=3 结合定义域知解集为{x|-1<x≤0}

鲁睿吴3353log1+log2+log3+log4...log100等于多少 -
华勇娟13246493393 ______ lg1+lg2+lg3+lg4+……+lg100 =lg(1*2*3*4*……*100) =lg(100!)

鲁睿吴3353请问log2(1+100)怎么算,等于多少 -
华勇娟13246493393 ______[答案] log(a)b=lgb/lga=lnb/lna log2(1+100)=lg101/lg2=ln101/ln2=6.6582114827517947371716591134903

鲁睿吴3353log2(x+1)+log2(x+8)=3的解集是???
华勇娟13246493393 ______ 解:要使log2(x+1),log2(x+8)有意义 x+1>0且x+8>0 ∴x>-1 ∵log2(x+1)+log2(x+8)=3且log2(x+1)+log2(x+8)可化为log2(x^2+9x+8) ∴log2(x^2+9x+8)=3 ∴x^2+9x+8=2^3=8 ∴x^2+9x=0 即x=0,x=-9 ∵x>-1 ∴x=0

鲁睿吴3353y=log24 - 1等于多少 -
华勇娟13246493393 ______[答案] y = log24 - 1 =log8 + log3 -(log2+log5) =3log2+log3-log2-log5 =2log2+log3-log5

鲁睿吴3353In根号e等于多少 1+log2的三等于多少 -
华勇娟13246493393 ______[答案] 1) ln √e=lne^(1/2)=1/2lne=1/2 2) 1+log2(3)=log2(2)+log2(3)=log2(2*3)=log2(6)