[X-1]^-17[X-1}+30=0怎么算
问题描述:
[X-1]^-17[X-1}+30=0怎么算
答
原方程可化为
(x-1-15)(x-1-2)=0
(x-16)(x-3)=0
x1=16,x2=3
答
令t=x-1
则,t^2-17t+30=0
(t-2)(t-15)=0
t=2或15
x-1=2或15 x=3或16
答
[X-1]^2-17[X-1}+30=0
原方程可化为:
(x-1-15)(x-1-2)=0
即:(x-16)(x-3)=0
x-16=0;x-3=0
所以:x1=16,x2=3 .