Find f'(1) if 6x*(f(x))^4 + 9x^3 f(x) = 78 and f(1) = -2

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

Factor the polynomial by its greatest common monomial factor.

Need solving this 2nd limit problem.