Usuń niewymierność z mianownika:
a)
b)
c)
d)
Wyłącz czynnki pod znak pierwiastka:
a]
5/√20=5√20/20=√20/4=2√5/4=√5/2
b]
20/∛24=20/[2∛3]=10/∛3=(10×∛9)/(∛3∛9)=10∛9/3
c]
1/∛200=1/2∛25=∛625/2∛25∛625=∛625/50=5∛5/50=∛5/10
d]
(3-√3)/(3+√3)=(3-√3)²/([3+√3)(3-√3)]=(3-√3)²/[9-3)=(9-6√3+3)/6=(12-6√3)/6=2-√3
√80=4√5
√125=5√5
∛250=5∛2
∛80=2∛10
a 5/√20= 5/√20 * √20/√20 =5√20/20= √20/4
b 20/∛20=20/∛20 *∛20/∛20*∛20/∛20= 20*∛20*∛20/20=∛20*∛20
c 1/∛200 = 1/∛200 * ∛200/∛200 *∛200/∛200= ∛200 *∛200/200
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a]
5/√20=5√20/20=√20/4=2√5/4=√5/2
b]
20/∛24=20/[2∛3]=10/∛3=(10×∛9)/(∛3∛9)=10∛9/3
c]
1/∛200=1/2∛25=∛625/2∛25∛625=∛625/50=5∛5/50=∛5/10
d]
(3-√3)/(3+√3)=(3-√3)²/([3+√3)(3-√3)]=(3-√3)²/[9-3)=(9-6√3+3)/6=(12-6√3)/6=2-√3
√80=4√5
√125=5√5
∛250=5∛2
∛80=2∛10
a 5/√20= 5/√20 * √20/√20 =5√20/20= √20/4
b 20/∛20=20/∛20 *∛20/∛20*∛20/∛20= 20*∛20*∛20/20=∛20*∛20
c 1/∛200 = 1/∛200 * ∛200/∛200 *∛200/∛200= ∛200 *∛200/200