Find dy/dx using logarithmic differentiation.

y = (3 + x)^4/x , x>0

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

For which pair of functions is (gof)(a)=|a|-2?

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)- 144x+360 what am i doing wrong?