Let f(x, y)= (y^2+1i + (2xy-2)j. compute single integral with subscript of c f * dr where
a). c is the straight path from (0,0) to (0,1)
b,) c is the path from (0,0) to (0,1) along the parabola y=x^2

I do not know if this is exactly what you are looking for

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: