Question

If p+1/p=7 then find the value of p^3+1/p^3​

Answer 1

Answer:

Step-by-step explanation:

p+1/p=3

from here..find value..of p..

p+1=3p

1=3p-p

1=2p

p=1/2

and it is 1/2

then put it in p-1/p..

1/2-1/1/2=-1

and the ans..is -1

p agaya

use equation me put krdo

Answer 2

Answer:

322

Step-by-step explanation:

${p}^{3} +\frac{1}{ {p}^{3} }={(p+ \frac{1}{p})}^{3}-3\times p \times \frac{1}{p}(p + \frac{1}{p} )$

now value of -

$p + \frac{1}{p} = 7$

then by putting values-

${p}^{3} +\frac{1}{ {p}^{3} } = 322$