Question

if pv = 81, then dp/dv at v = 9​

Answer 1

Answer:

pv = 81

or, p=81/v

or, dp/dv=81* {d(1/v) /dv}

or, dp/dv=81* logv=81 * log 9=81 * 2 * log3

=162 * 0.47712,[log3=0.47712]

=77.2936