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-3pe8 x 1pe2+(-5pe6)x(-1pe2)

Răspuns :


[tex] - \frac{3}{8} \times \frac{1}{2} + ( - \frac{5}{6}) \times ( - \frac{1}{2}) = - \frac{3}{8} \times \frac{1}{2} + \frac{5}{6} \times \frac{1}{2} = - \frac{3}{16} + \frac{5}{12} = \frac{ - 9 + 20}{48} = \frac{11}{48} [/tex]