Given that a point P (1, 3) lies on the circumference of the circle from the centre (4, 7): Find the gradient of the line from the centre to point P (1, 3)
Hence, find the equation of the normal to the circle at P (1, 3)
find the equation of the tangent to the circle at P (1, 3)
Find the Radius of this circle.

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:

answer: list the statements and i will follow up!

step-by-step explanation: