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warunek 2)Δ>0, 16m²+32m+16-8m²+4m>0, 8m²+36m+16>0, 2m²+9m+4>0
Δ1=81-32=49
√Δ1=7
m1=-4 m2=-1/2
m∈(-∞,-4)∨(-1/2, +∞)
warunek3) podany w zadaniu:
1/x1 +1/x2= (x1+x2)/x1x2=(-b/a)/(c/a)=-b/c=-4m-4/m m≠0
4m-4/m>m
4m-4/m - m>0
(4m-4-m²)/m>0
(-m²+4m-4)m>0
(m²-4m+4)m<0
(m-2)²m<0
(m-2)² - zawsze nie ujemne , wiec m<0
1)i 2) i 3) m∈(-∞,-4)∨(-1/2,0)