Math Problem Statement
座標平面上のx>0の領域において、2つの曲線y=logx/xとy=k/xを考える。kは正の実数とする。2つの曲線はただ一つの交点を持ち、その座標をaとする。aは1<a<eの範囲にある。eは自然対数の底である。またlimx→∞でlogx/x=0である。kは0<k<1の範囲にある。この時2つの曲線と直線x=1および直線x=eによって囲まれる図形の面積Sの最小値とその時のkの値を求めよ。
Solution
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Math Problem Analysis
Mathematical Concepts
Calculus
Integration
Logarithmic Functions
Curve Intersection
Formulas
Intersection of curves: log(x)/x = k/x
Area calculation using definite integrals: S = ∫(log(x)/x - k/x) dx
Definite integral of log(x)/x: ∫(log(x)/x) dx = (log(x))^2 / 2
Theorems
Properties of Definite Integrals
Logarithmic Differentiation
Suitable Grade Level
College Level
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