Question

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

Answer 1

Salut,

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

Green eyes.

Answer 2

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

inversul nr 1/63 = > 63