First, use the substitution y₁(x) = e-5x. Y₂(x) = u(x)y₁(x) u(x)e-5x = Then, use the product rule to find the first and second derivatives of y2. Y₂' = - 5ue-5x + u'e-5x Y2" = (-5u'e-5x + + = u'e-5x - 10u'e-5x + Jue-5x) + (u'e-5x -5u'e-5x ) Jue-5x

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