MathCastle
Differential EquationsMediumThe Wronskian & Variation of Parameters

The Wronskian & Variation of Parameters · Medium problem

The Euler equation t2y′′+3ty′+y=0t^2y''+3ty'+y=0 (t>0t>0) has repeated-root solutions y1=1ty_1=\dfrac1t and y2=ln⁡tty_2=\dfrac{\ln t}t. Find the common value of y1(t)=y2(t)y_1(t)=y_2(t) at the (unique) point where their graphs cross for t>1t>1.