Enter: format long. Use mynewton on the function
f(x)=x⁵ −7, with x₀=2. By trial and error, what is the lowest value of n for which the program converges (stops changing). Compute the error, which is how close the program's answer is to the true value. Compute the residual, which is the program's answer plugged into f. Are the error and residual zero?