Question

if x=r/n, then how dx = 1/n?

Answer 1

Step-by-step explanation:

given,X=r/n

Now, Differentiate X with respect to r we get

dx/dr=d(r/n) /dr

n( dr/dr) - r (dn/dr)

= ----------------------------

n^2

(n×1-r×0)

= ----------------

n^2

n

= -----------------------

n^2

1

= ------------------

n

so, dx/dr=1/n

not only dx =1/n