a = m²-1 b = -2mx c = -7
a)
a=0 , więc:
m²-1 =0
m = ±1
b)
a>0
m²-1 >0
m > ± 1
+ + + + + + +
-------.----------.-------------->
-1 - - - - 1
x∈(-∞ , -1) U (1,+∞)
c)
a<0
m²-1 < 0
m<±1
x∈(-1,1)
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a = m²-1 b = -2mx c = -7
a)
a=0 , więc:
m²-1 =0
m = ±1
b)
a>0
m²-1 >0
m > ± 1
+ + + + + + +
-------.----------.-------------->
-1 - - - - 1
x∈(-∞ , -1) U (1,+∞)
c)
a<0
m²-1 < 0
m<±1
x∈(-1,1)