Question

ex.6,11
URGENT!!
SUPER Urgent!

Answer 1

Răspuns:

Explicație pas cu pas:

6)

(x,y,z) d.p . (3,4,5 )

xy+yz+xz=188

x/3=K

x=3K

y/4=K

y=4K

z/5=K

z=5K

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3K*4K + 4K *5K + 3K*5K= 188

12K²+20K²+15k²=188

47K²=188

K²=188:47

K²=4

K=√4

K=2

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x= 3K = 3*2=6

y=4K= 4*2=8

z= 5K= 5*2= 10

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11)

(x,y,z) d.p. ( 2,5,8 )

x/2=K

x=2k

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y/5=K

y=5K

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z/8=K

z= 8K

2K+8K=60

10K=60

K= 60:10

K= 6

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x= 2K= 2*6=12

y=5K=5*6=30

z= 8K= 8*6=48

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