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inversul nr (3 radical din 7)totul la -2 este....
Va rog!
Am nevoie urgent!



Răspuns :

Salut,

[tex]\dfrac{1}{(3\sqrt7)^{-2}}=\dfrac{(3\sqrt7)^{0}}{(3\sqrt7)^{-2}}=(3\sqrt7)^{0-(-2)}=(3\sqrt7)^{+2}=9\cdot 7=63.[/tex]

Green eyes.
(3√7)^-2 = > 1/(3√7)² = 1/(3²×7) = 1/(9×7) = 1/63 

inversul nr 1/63 = > 63