A. √5 - √3
B. √8 + √3
C. 8 - √3
D. √8 - √3
3. Bentuk sederhana dari 4⁴ + 4⁴ + 4⁴ + 4⁴ adalah....
A. 5 × 4⁴
B. 6 × 4⁴
C. 4 × 4⁴
D. 3 × 4⁴
4. Hasil dri √8 pangkat ⅔ adalah....
A. ¼
B. ½
C. 2
D. 4
Tolong ya, jangan ngasal juga
Jawaban:
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1.
[tex] {2}^{ - 2} + {4}^{ - 1} \\ = \frac{1}{ {2}^{2} } + \frac{1}{ {4}^{1} } \\ = \frac{1}{4} + \frac{1}{4} \\ = \frac{2}{4 } \\ = \frac{1}{2} \: (b)[/tex]
2.
[tex] \frac{5}{ \sqrt{3} - \sqrt{8} } \\ = \frac{5}{ \sqrt{3} - \sqrt{8} } \times \frac{ \sqrt{3 } + \sqrt{8} }{ \sqrt{3} + \sqrt{8} } \\ = \frac{5 \times \sqrt{3} + \sqrt{8} }{3 - 8} \\ = \frac{5 \times \sqrt{3} + \sqrt{8} }{ - 5} \\ = - \sqrt{3} + \sqrt{8} \\ = \sqrt{8} - \sqrt{3} \: (d)[/tex]
3.
4⁴ + 4⁴ + 4⁴ + 4⁴
= 4 × 4⁴ (C)
4.
[tex] { \sqrt{8} }^{ \frac{2}{3} } \\ = \sqrt[3]{ { \sqrt{8} }^{2} } \\ = \sqrt[3]{ \sqrt{64} } \\ = \sqrt[3]{8} \\ = 2 \: (c)[/tex]
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Answer By : @mlk39
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