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Home » Solve using the quadratic formula: \(x = \frac{-70 \pm \sqrt4900 + 5600}8\). - Blask

Solve using the quadratic formula: \(x = \frac{-70 \pm \sqrt4900 + 5600}8\). - Blask

📅 March 10, 2026 👤 scraface

Mar 10, 2026

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📌 Thus, the closest point is $ \left( -\frac{24}{25}, \frac{32}{25} \right) $.

📌 \boxed{\left( -\frac{24}{25}, \frac{32}{25} \right)}

📌 Question: A cloud computing consultant models data flow efficiency as $ f(x) = (\sin x + \cos x)^2 + \frac{1}{\sin x \cos x} $, for $ 0 < x < \frac{\pi}{2} $. Find the minimum value of $ f(x) $.

📌 Solution: First, expand $ (\sin x + \cos x)^2 = \sin^2 x + 2\sin x \cos x + \cos^2 x = 1 + 2\sin x \cos x $.

📌 Let $ s = \sin x \cos x $. Then:

📌 f(x) = 1 + 2s + \frac{1}{s}

📌 Note $ s = \frac{1}{2} \sin 2x $, and since $ 0 < x < \frac{\pi}{2} $, $ 0 < 2x < \pi $, so $ 0 < \sin 2x \leq 1 $, hence $ 0 < s \leq \frac{1}{2} $.

📌 Define $ g(s) = 1 + 2s + \frac{1}{s} $, for $ 0 < s \leq \frac{1}{2} $.

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