Question
Download Solution PDFIf α ∈ (0, π/2), then minimum value of \(2x+\frac{tan^2α}{2x}\) is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFअवधारणा:
समांतर माध्य, ज्यामितीय माध्य, हरात्मक माध्य के सूत्र:
यदि A संख्या a और b का समांतर माध्य है
⇔ \({\rm{A}} = \frac{{{\rm{a\;}} + {\rm{\;b}}}}{2}\)
यदि G संख्या a और b का ज्यामितीय माध्य है
⇔ \({\rm{G}} = \sqrt {{\rm{ab}}} \)
समांतर माध्य (AM) और ज्यामितीय माध्य (GM) के बीच संबंध
AM ≥ GM
गणना:
Given that,
\(2x+\frac{tan^2α}{2x}\)
Let a = 2x, b = \(\frac{tan^2α}{2x}\)
We know that,
AM ≥ GM
\(\frac{2x+\frac{tan^2α}{2x}}{2} ≥ \ \sqrt{2x\times\frac{tan^2α}{2x}}\)
⇒ \(2x+\frac{tan^2α}{2x}\) ≥ 2 tan α
⇒ \(2x+\frac{tan^2α}{2x}\) ∈ [2 tan α, ∞)
Hence, the minimum value is 2 tan α.
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