Question

Identify the variation as direct, inverse, joint or combined. l=cmn

Answer 1

joint

Explanation:

Answer 2

The variation is joint variation.

Explanation:

The given equation is,

`I=c\cdot m\cdot n`

where

c is the proportionality constant.

So,

`I\propto m\cdot n`

This can be segregated as,

`I\propto m` and
`I\propto n`

Therefore, I is in direct variation with m and n separately. But as both variations are of same type, so I is in joint variation with m and n.