1.oblicz pierwiastek, 7.włącz czynnik przed znak pierwiastka, 9.usuń niewymierności z mianownika ułamka. Treść w załącznikach.
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1)
√11 1/9 -√1,44 *√2 1/4 = √100/9 -√144/100 *√9/4 =
=10/3 - 12/10 *3/2 = 10/3 -18/10 = 100/30 - 54/30 = 46/30 = 1 16/30 =1 8/15
7)
2/5√15 =√( 2/5*2/5*15)=√60/25=√12/5
1/2∛-32 = √(1/2*1/2*1/2*-32) = ∛(-32/8)=∛-4
9)
a)4/√5 = 4/√5 * √5/√5 = 4√5/5
b) 3√3/√6 = 3√3/√6 * √6/√6 = 3√18/6 = 3√9*2 /6 = 3*3√2/6 = 9√2/6=3√2/2
zad.1
a)
√11 1/9 - √1,44 * √2 ¼ = √ 100/9 – 1,2* √9/4 = 10/3 – 1,2 * 3/2 = 10/3 - 1,8 =
=10/3 -18/10 =10/3 – 9/5 = 50/15 – 27/15 = 23/15 = 1 8/15
zad.7
b)
2/5√15 = √4/25 *15 = √12/5
c)
1/2³√-32 = ³√1/8*(-32) = ³√-4
zad.9
a)
4/√5 * √5/√5 = 4√5/5
b)
3√3/√6 * √6/√6 = 3√18/6 = 3√9*2/6 = 9√2/6 = 3√2/2