witam proszę o pomoc
wyznacz odległości punktu M(-1,5) do prostej o równaniu
a) X-Y+1=0
b)Y=2X-1
wzór
a)
b)-2x+y+1=0
d= /Ax0+By0+C/
----------------------
√A²+B²
a) x-y+1=0
M(-1,5)
A=1, B=-1 c=1
/1*(-1)+(-1)*5+1/ /-1-5+1/ /-5/ 5 5 √2
-------------------------- = -------------------= -------= ---------- = -----
1²+ (-1)² √2 √2 √2 2
b)y=2x-1
2x-y-1=o
A=2 B=-1 C=-1
/-2-5-1/ /-8/ 8 8 √5
---------- =-----------=---------= --------
√4+1 √5 √5 5
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wzór
a)
b)-2x+y+1=0
d= /Ax0+By0+C/
----------------------
√A²+B²
a) x-y+1=0
M(-1,5)
A=1, B=-1 c=1
/1*(-1)+(-1)*5+1/ /-1-5+1/ /-5/ 5 5 √2
-------------------------- = -------------------= -------= ---------- = -----
1²+ (-1)² √2 √2 √2 2
b)y=2x-1
2x-y-1=o
A=2 B=-1 C=-1
/-2-5-1/ /-8/ 8 8 √5
---------- =-----------=---------= --------
√4+1 √5 √5 5