Solve the below:
Q1. Let f(x) = x/(x^2 + 1) Find the point(s) on the graph where the tangent line is horizontal.
Q2. Extend the product rule for differentiation to the following case involving the product of three differentiable functions: Let h(x) = u(x)v(x)w(x) and show that h prime (x) = u(x)v(x)w prime(x) + u(x)v prime(x)w(x) + u prime(x)v(x)w(x)
Q3. g(x) = sqrt(2x+1)/ sqrt(2x-1)Find derivative
Q4. 2(t^3-1)^5 Find derivative