Wyznacz x jeśli liczby x² , 2x-1, x-2 tworzą ciąg aretmetyczny
a1=x^2
a2=2x-1
a3=x-2
a3-a2=a2-a1=r
x-2-(2x-1)=2x-1-x^2
x-2-2x+1-2x+1+x^2=0
x^2-3x=0
x(x-3)=0
x=0 lub x=3
spr.
I
a1=0
a2=-1
a3=-2
a3-a2=-2+1=-1
a2-a1=-1-0=-1
II
a1=3^2=9
a2=2*3-1=5
a3=3-2=1
a3-a2=1-5=-4
a2-a1=5-9=-4
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a1=x^2
a2=2x-1
a3=x-2
a3-a2=a2-a1=r
x-2-(2x-1)=2x-1-x^2
x-2-2x+1-2x+1+x^2=0
x^2-3x=0
x(x-3)=0
x=0 lub x=3
spr.
I
a1=0
a2=-1
a3=-2
a3-a2=-2+1=-1
a2-a1=-1-0=-1
II
a1=3^2=9
a2=2*3-1=5
a3=3-2=1
a3-a2=1-5=-4
a2-a1=5-9=-4
x=0 lub x=3