Continuity and Differentiability

Rewrite the following equations in the logarithm from :
$$5^0 \, = \, 1$$
If $$\log^2 \left(\dfrac{a}{b}\right) + \log^2 \left(\dfrac{b}{c}\right) + \log^2 \left(\dfrac{c}{a}\right) + \log^2 a + log^2 b + \log^2 c - log \, abc + k \ge 0$$ where a, b, c, k are real position numbers then value of 'k' can be
Find derivative of following function with respect to x
Find $$\dfrac{dy}{dx}$$ of the functions given
Differentiate the following function w.r.t.x.
$$\dfrac{1}{(x^{2}+3^{2})}$$