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c/a + c/a + c/a =2
3c/a = 2
2a=3c a=1
2=3c
c=2/3
x²-(m-3)x+m-1=0
Δ>0
Δ=(-(m-3))² - 4(m-1)
(-m+3)² -4m + 4 > 0
m² - 6m +9 -4m + 4> 0
m²-10m +13 > 0
Δm= 100 - 52= 48
√Δ= √48= 4√3
m₁=10- 4√3/2= 3-2√3
m₂ = 10-+4√3/2 = 3+2√3
po narysowaniu wykresu widzimy ze
m∈ (-∞, 5-2√3) U ( 5+2√3, ∞)
lecz jeszce c=2/3
c= m-1
2/3=m-1
m= 1 2/3 parametr m musi miec taka wartosc