How to Differentiate U/v?

The second way to differentiate u / v is to use the quotient rule, which has this nice little jingle: Low d hi minus hi d low, all over the square of what's below. Here, u is the high and v is the low, so y`= (vu` - uv`) / v^2, and you end up with the same equation for y`.

What is the formula for U by V?

The uv differentiation formula is (uv)' = u'v + v'u.

What is d by dx of U by V?

Quotient Rule: d/dx (u/v) = ( v du/dx - u dv/dx)/v.