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a)Stabiliti valoarea de adevar a propozitiei [tex]\sqrt{1*2*3*..*31+32}[/tex]∈Q.
b) Descompuneti in factori :(x²+x+2)(x²+x+5)+2.
c)Calculati:[tex]\frac{1}{\sqrt{1+}\sqrt{2} }[/tex][tex]\frac{1}{\sqrt{2+}\sqrt{3} }[/tex]+[tex]\frac{1}{\sqrt{3+}\sqrt{4} }[/tex]+...+[tex]\frac{1}{\sqrt{99+}\sqrt{100} } .[/tex]