Thread: reciprocal

The sum of a number and its reciprocal is 6.41. What is the number?

so that couldbe writen as x+1/x=6.41
multiply both sides by x and you get x^2+1=6.41x
rewrite it as x^2-6.41x+1=0
and then use the quadratic formula to solve for x and you get x=6.25