Răspunsuri

2014-08-07T20:13:35+03:00
A) x= 0

0-y+1=0

-y= -1

y=1

b)y =-1

x+1+1=0

x= -2

c)x=a

a+y+1=0

y= -a-1
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2014-08-07T20:13:40+03:00
A ) x=0 => -y+1=o =>y=1
b ) y=-1 => x-(-1)+1=0 => x+2=0=> x=-2
c ) x=a => a-y+1=0 => -y=-a-1 deci y=a+1
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