Pierwiastki ;(
zad. 1
Usuń niewymierność z mianownika.
a)
b)
c)
zad. 2
a)
b)
c)
d)
Jak nie umiesz to nie rób !!!! Daję naj ;)
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1.
a) 20/√5 = 20/√5 * √5/√5 = 20√5 / 5 = 4∋5
b) -4√14 / 5√7 = -4√14 / 5√7 * √7/√7 = -4√98 / (5*7) = (-4 * 7√2) / 35 = -28√2/35
c) 2 / 5√7 = 2 / 5√7 * √7 / √7 = 2√7 / 35
2.
a) .... = ∛(49 + 15) = ∛64 = ∛(4³) = 4
b)... = 2 * √(9 *2) + 3 * ∛(3 * 9) = 2 * 3√2 + 3 * ∛27 = 6√2 + ∛(3³) = 6√2 + 3
c) ... = 2 * 27 = 54
d)... = (2√(16 * 3) - 3√(4 * 3)) / 2√3 = (8√3 - 6√3) / 2√3 = 2√3 /2√3 = 1
a)20*pier5
pier5*pier5= 20/5=4
b)-4*pier14
5*pier7 = -4/5
c)2*5pier3
5pier3*5pier3 = 2
zad 2
1) \sqrt{64}=4
b) \sqrt{4} * \sqrt{21}* \sqrt{27+729=756}=\sqrt{18900}
c) \sqrt{4} * 27=\sqrt{4*27}=\sqrt{108}
d) nie wiem