Solve |x| < 12

{-12, 12}
{x|-12 < x < 12}
{x|x < -12 or x > 12}

To find the inverse of a number a, one can use the equation f(c) = a-1/c=0 where c is the inverse of a use the secant method of finding roots of equations to find the inverse of a = 2.5 ,er = 0.001%