If u f r
- if r is the smallest equivalence relation
- if r is the radius of the earth and g
- if r xl and xc represent resistance
- if r vectoru003dxi+yj+zk
- if r represents the distance of a point from origin
- if r is the average radius of earth
- if r and h are the horizontal range
- if r varies directly as s and inversely as the square of u
- if r and s are positive prime numbers
- if r is the radius of the earth
