Q4 PLEASE TELL FAST ALL PARTS OF Q4
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Answer:
(a) 0
(b) 2 - 2√2
(c) 6
Step-by-step explanation:
x = 1-√2
1/x = 1/1-√2
= 1/1-√2 x 1+√2/1+√2
= 1+√2 / -1
= √2-1
x² = (1-√2)²
= 1+2-2√2
= 3-2√2
1/x² = 1/3-2√2
= 1/3-2√2 x 3+2√2/3+2√2
= 3+2√2 / 9-8
= 3+2√2
(a) x + 1/x = 1 - √2 + √2 - 1
= 0
(b) x - 1/x = 1 - √2 - √2 + 1
= 2 - 2√2
(c) x² + 1/x² = 3 - 2√2 + 3 - 2√2
= 6
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Answer:
According to me this was correct answer
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