Zad. 12
[tex] \sqrt[3]{81 \times 64} [/tex]
81 |3\
27 |3-
9 |3/
3 |3
1
64 |2\
32 |2-
16 |2/
8 |2\
4 |2-
2 |2/
1
[tex]2 \times 2 \times 3 \sqrt[3]{3} = 4 \times 3 \sqrt[3]{3} = 12 \sqrt[3]{3} [/tex]
Prawidłowa odpowiedź: D
Zad. 13
[tex] \sqrt{3} ( \sqrt{27} - \sqrt{12} ) = \sqrt{27 \times 3} - \sqrt{12 \times 3} = \sqrt{81} - \sqrt{36} = 9 - 6 = 3[/tex]
Odpowiedź: C
Zad. 14
[tex] {9}^{15} \div 3 = {({3}^{3} )}^{15} \div {3}^{1} = {3}^{3 \times 15 - 1} = {3}^{45 - 1} = {3}^{44} [/tex]
3⁴⁴≠3¹⁵
Odpowiedź: D
