Question

if P(n):1³+2³+3³+....+(n+1)³=K so find the left hand side of P(2)​

Answer 1

Answer:

27

Step-by-step explanation:

p(n)=(n+1)³

p(2)=(2+1)³

p(2)=3³

p(2)=27

Answer 2

${1}^{3} + {2}^{3} + {3}^{3} + ..... + {(n + 1)}^{3} = {( \frac{n(n + 1)}{2}) }^{2} \\ so \: p(2) \: is \\ {1}^{3} + {2}^{3} = {( \frac{2 (2 + 1)}{2}) }^{2} \\ 9 = {3}^{2} = 9$