1.
Let f(x)=dx(3+4x2)43x2f(x) = \int \frac{dx}{(3+4x^2)\sqrt{4-3x^2}}, x<2/3|x|<2/\sqrt3. If f(0)=0f(0)=0 and f(1)=1αβtan1(α/β)f(1)=\frac{1}{\alpha\beta}\tan^{-1}(\alpha/\beta), α,β>0\alpha,\beta>0, then α2+β2=\alpha^2+\beta^2 =