Решить с помощью теоремы Виета: Не вычисляя корней уравнения [tex]3x^{2} +8x-1=0[/tex], [tex]2x^{2} -5x-4=0[/tex] найдите: а) [tex]\frac{1}{x_{1}^{2}}+ \frac{1}{x_{2}^{2}}[/tex] б) [tex]x_{1}x_{2} ^{4} + x_{2}x_{1}^{4}[/tex] в) [tex]\frac{x_{1} }{x_{2} } +\frac{x_{2} }{x_{1} }[/tex] г) [tex]x_{1}^{5}+x_{2}^{5}[/tex]
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