Răspuns :
Răspuns:
Explicație pas cu pas:
A= { -5,-4,-3,-2,-1 ,0 , 1}
B= { -3 }
C={ - 3,-2,-1,0 ,1,2,3 }
D= {-2,-1 ,0 ,1,2,3 }
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2)
a/2=b/ 3= c/4 =d/5 = e/6 =K ( K= coeficient de proportionalitate )
a= 2K
b= 3K
c= 4K
d= 5K
e= 6K
2K+3K+4K+5K+6K= 1200
20K= 1200
K= 1200:20
K= 60
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înlocuim cu K= 60
a= 2K= 2*60= 120
b= 3*K= 3*60= 180
C= 4K= 4*60=240
d= 5K= 5*60= 300
e= 6K= 6*60= 360
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3)
2a= K→a= k/2
3b=K→ b=K/3
4c=K→ c= K/4
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(k/2)²+(k/3)²+(K/4)²= 976
k²/4+K²/9+K²/16= 976
aducem la acelasi numitor fractiile
36K²/144+16K²/144+ 9K²/144= 976
61K²/144=976
61K²= 976x144
61K²= 140.544
K²= 140.544:61
K²= 2304
K=√ 2304
K= 48
Înlocuim cu K= 48
a= 48/2=24
b= 48/3=16
c=48/4=12