2^(3x+1)=3^(x-2)
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/16 08:28:22
xN0_c*XqJq_ ,`XZU'6`-u雠&*S^;; 6ww\U˳ZevpzNB%w"O"~,BZhI} Q-L sqY0Bd+)μUiE:_
㦷y̓l<͆U8|AEDvJсvdL9mkC%<UcT$ }k-Ct-,۽ΰfl-@ Y%9btRSP
F(
2^(3x+1)=3^(x-2)
2^(3x+1)=3^(x-2)
2^(3x+1)=3^(x-2)
2^(3x+1)=3^(x-2)
两边取对数lg2^(3x+1)=lg3^(x-2)
(3x+1)lg2=(x-2)lg3
3lg2 *x+lg2=lg3*x -2lg3
(3lg2-lg3)x=-2lg3-lg2
∴x=(-2lg3-lg2)/(3lg2-lg3)
(需要时可化为x=lg18/lg(3/8)
2^(3x+1)=3^(x-2)
2^3x*2=3^x*1/9
8^x*18=3^x
(3/8)^x=18
取对数
x=lg18/l(3/8)
=-2.95
两边取对数,得
(3x+1)lg2=(x-2)lg3
所以x=(lg18)/(lg3-3lg2)
2^(3x+1)=3^(x-2)
即2×2^(3x)=1/9 × 3^x
即 18=3^x/2^(3x)
即 18=3^x/8^x
即 [3/8]^x=18
即x=log3/8 (18)
两边求导
(3x+1)ln2=(x-2)ln3
3ln2x-ln3x=-2ln3-ln2
x=(-2ln3-ln2)/(3ln2-ln3)
2^(3x+1)=3^(x-2)
(3x+1)ln2=(x-2)ln3
3xln2+ln2=xln3-2ln3
3xln2-xln3=-2ln3-ln2
x(ln8-ln3)=-(ln9+ln2)
xln(8/3)=-ln18
x =-ln18/ln(8/3)
(X+1)X(X+2)X(X+3)=504
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
七年级下册政治复习提纲(山东人民出版社)第五单元是 青春的脚步 青春的气息别弄错了啊!格式:X X X X X X X X X 1、X X X X X X X X X X.2、X X X X X X X X X.3、X X X X X X X X X X X.
(x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3)
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
x(x-2)-2x(x+1)-3x(x-5) 其中x=负½
x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x
请问这道题咋做 :(x)X (x+1) X (x+2) X (x+3) =360
X+X+X+(X-1)+(X-2)+(X-3)+(X-4)=10(X-3)+(X-4)
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(x-2)-4
(x+1)/(x+2)+(x+8)/(x+9)解答x+1/x+2+x+8/x+9=x+2/x+3+x+7/x+8
f(x-1)=x^2-2x+3(x
x(x+2)-(x-1)(x+2)=3 怎莫做
3/(1+x)=(x^2-x+1)/(1+x)