Question

find the solution for this problem ​

Answer 1

$n(n + 1) {}^{3} \leqslant (1 {}^{3} + 2 {}^{3} + 3 {}^{3} + ... + n {}^{3}$

$∴ \: 1 {}^{3} + 2 {}^{3} + 3 {}^{3} + ...n {}^{3} = \frac{n {}^{2}(n + 1) {}^{2} }{4}$

$= > n(n + 1) {}^{3} \leqslant 2n {}^{2}(n + 1) {}^{2}$

$= > 2n \geqslant (n + 1)$

$= > n \geqslant 1,which \: is \: true.$

Step-by-step explanation:

$@ANSWERER }$

Answer 2

Answer:

refer to the image for solution hope it will help