yes 72.
Derivative? Methinks you are lost. This is not calculus at all, well below that, Algebra II, the law of exponents.
http://mathworld.wolfram.com/ExponentLaws.html
Go over those laws. As a check on your work...
2*2+3*4=r
The expression (3a^2 b^4 c^2)^2 (2a^4 b^2 c^4)^3 equals na^r b^s c^t
It ask what n, the leading coefficient is and I think it is 72? and to find the exponents r s and t would you just multiply it but whatever number is on the outside? or do I need to find the derivative??
2 answers
Now as a personal note, if you are having problems with these and you are in calculus, I would do some soul searching about your math preparedness. Something is just not right here. If you put Calculus in your subj title and you are in Alg II, you are pretending to be something you are not, which again indicates some serious personal issues.