If x + \( \frac{1}{x} \) = 5, then x² + \( \frac{1}{x^2} \)= ?
In the adjoining figure line l is parallel to line m. What is the value of x + 2y?
If the force of attraction between the earth and an apple separated by distance 'x' is 'F', then the force acting on the same apple kept at a distance '2x' will be _____.