The marginal cost of manufacturing x yards of a certain fabric is C'(x)=3-0.01x+0.000006x^2 ( in dollars per yard ). Find the increase in cost if the production level is raised from 500 yards to 5000 yards.
and
fnInt((x^3 +3 + 1/(x^2+1))dx)
I suppose for this one you want:
that is not a hard function to integrate. just use the power rule. unless you should be calculating something else. the only place i encountered things like "marginal cost" and such was in a microeconomics class, and we never used calculus at all, so i'm not sure how to relate everything
what do you mean "fnInt"?
and
fnInt((x^3 +3 + 1/(x^2+1))dx)