The calibration of a specialized velocity sensor C(v)C(v)C(v), where v v\,v represents a small change in velocity from a reference state, is modeled by the function: C(v)=15(25+kv)−12C(v) = 15(25 + kv)^{-\frac{1}{2}}C(v)=15(25+kv)−21 Given that the binomial expansion of C(v)C(v)C(v) in ascending powers of v v\,v is P−0.12v+Rv2+…P - 0.12v + Rv^2 + \dotsP−0.12v+Rv2+…
find the values of the constants kkk, PPP, and RRR.
State the range of values of v v\,v for which this expansion is valid.
For this expansion, find the coefficient of the term in v3v^3v3.