27.5 - The Cauchy–Schwarz Inequality
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Practice Questions
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Given vectors u = (1, 1) and v = (1, -1), calculate |⟨u,v⟩| and check if it satisfies the Cauchy-Schwarz Inequality.
💡 Hint: Remember to find the norms first.
For u = (2, 2) and v = (1, 3), determine the inner product and norms, checking the Cauchy-Schwarz condition.
💡 Hint: Calculate each component separately.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the Cauchy-Schwarz Inequality state about two vectors u and v?
💡 Hint: Think about how inner products relate to vector lengths.
What condition must hold for equality in the Cauchy-Schwarz Inequality?
💡 Hint: Consider the definition of linear dependence.
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Challenge Problems
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Prove that for any vectors u = (u1, u2) and v = (v1, v2) in R², |u1v1 + u2v2| ≤ √(u1² + u2²) * √(v1² + v2²) holds.
💡 Hint: Identify the components systematically for clarity.
If a triangle's vertices correspond to vectors A, B, and C, derive the triangle inequality using the Cauchy-Schwarz Inequality.
💡 Hint: Focus on the relationships each side forms with respect to the others.
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