calculati a)(-2)^-1+2^-3 b) (radical 3)^-1+(-radical 3)^-3 c) (radical 4+ radical 5)^-1+(radical 5+ radical 9)^-1
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Va rog
Este urgent


Răspuns :

a)
[tex]( - 2) {}^{ - 1} + 2 {}^{ - 3} = [/tex]
[tex] - 2 {}^{ -1} + \frac{1}{2 {}^{3} } [/tex]
[tex] - \frac{1}{2} + \frac{1}{8} = [/tex]
[tex] - \frac{3}{8} [/tex]