What is r/k selection?

In a certain region of space, the gravitational field is given by -(k)/(r) where r is the distance and k is a constant. If the gravitaional potential at r=r_(0) be V_(0) , then what is the expression for the gravitaional potential (V)-

In a certain region of space, the gravitational field is given by -(k)/(r) where r is the distance and k is a constant. If the gravitaional potential at r=r_(0) be V_(0) , then what is the expression for the gravitaional potential (V)-

In a certain region of space, the gravitational field is given by -(k)/(r) where r is the distance and k is a constant. If the gravitaional potential at r=r_(0) be V_(0) , then what is the expression for the gravitaional potential (V)-

Differentiate 'r' and 'k' selected growth forms.

Find the number of selections of six letters from the letters of the word 'K A R N A T A K A'

There are p letters a,q letters b,retters C.The number of ways of selecting k letters out of these if p

There are p letters a, q letters b, r letters C.The number of ways of selecting k letters out of these if p lt k lt q lt r is

There are p letters a, q letters b, r letters C.The number of ways of selecting k letters out of these if p lt k lt q lt r is