Odpowiedzi

2009-12-15T16:15:26+01:00
I2x + 1I - Ix - 2 I = 10
2x +1 -x +2 = 10
x +3 =10
10-3 = 7
x=7
1 1 1
2009-12-15T16:21:32+01:00
|2|*Ix+½I-Ix-2I= 10
2Ix+½I-Ix-2I= 10

1° 2(x+½)-(x-2)=10 dla x≥2
2° 2(x+½)+(x-2)=10 dla x∈<-½,2)
3° -2(x+½)+(x-2)=10 dla x<-½


2x+1-x+2=10
x=7>2


2x+1+x-2=10
3x=11
x=11/3∉<-½,2) odpada


-2x-1+x-2=10
-x=13
x=-13<-½ ok

x₁=7 x₂=-13