Dla jakich wartości parametru m , równanie (m+1)x² - 4mx +m+1 = 0 ma dwa różne pierwiastki dodatnie?
m∈(-∞,-1)u(-1,)u(1,∞)
m∈R\{-1}
Odp: m∈(-∞,-1)u(-1,)u(1,∞)
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m∈(-∞,-1)u(-1,)u(1,∞)
m∈R\{-1}
Odp: m∈(-∞,-1)u(-1,)u(1,∞)