I need to find a number such that the sum of the number and its reciprocal is 20. Anyone, pls?
Follow Math Help Forum on Facebook and Google+
need to refine your question a bit more.. $\displaystyle 1/x +x $ will always =1
Originally Posted by Zara I need to find a number such that the sum of the number and its reciprocal is 20. Anyone, pls? $\displaystyle x + \frac{1}{x} = 20$ $\displaystyle x^2 + 1 = 20x$ $\displaystyle x^2 - 20x + 1 = 0$ You can now use the quadratic formula to calculate the values for $\displaystyle x$
Originally Posted by skystar need to refine your question a bit more.. $\displaystyle 1/x +x $ will always =1 Wouldn't that apply to multiplication?
Hey Thanks a million
Originally Posted by Zara Hey Thanks a million You are welcome
View Tag Cloud