1、方程log3(x^2-10)=1+log3x

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/23 09:00:10
1、方程log3(x^2-10)=1+log3x1、方程log3(x^2-10)=1+log3x1、方程log3(x^2-10)=1+log3xlog3(x^2-10)=1+log3xlog3(x^2

1、方程log3(x^2-10)=1+log3x
1、方程log3(x^2-10)=1+log3x

1、方程log3(x^2-10)=1+log3x
log3(x^2-10)=1+log3x
log3(x^2-10)-log3x=1
log(x^2-10)/3x=1
(x^2-10)/3x=3
x^2-9x-10=0
x1=10 x2=-1

log3(x^2-10)=1+log3x
log3(x^2-10)=log33+log3x
log3(x^2-10)=log9x
(x^2-10)=9x
x²-9x-10=0
(x-10)(x+1)=0
x=10,x=-1