search for: p2sq

...would like to request your help and comments. I have the function: p2<-function(x){0.5*(3*x^2-1)} # I found the square of p2 by using some pencil and paper. # The result is inside myfunc below myfunc<- function(x) {0.25*(9*x^4+6*x^2+1)} # Below I made R to find the square of p2 p2sq<-function(x) {p2(x) * p2(x)} # Now I am trying to integrate both two function at the same interval. #Both functions should denote the square of p2 integrate(p2sq,-1,+1) # returns 0.4 with absolute error < 4.4e-15 integrate(myfunc,-1,+1) # returns 2.4 with absolute error < 2.7e-1...