Question

Plz answer
${1}^{3} - {2}^{3} + {3}^{3} - {4}^{3} + {5}^{3} - {6}^{3} + {7}^{3} - {8}^{3} + {9}^{3} - {10}^{3}$

Answer 1

1^3-2^3+3^3-4^3+5^3-6^3+7^3-8^3+9^3-10^3

1^3+(-2^3)+3^3+(-4^3)+5^3+(-6^3)+7^3+(-8^3)+9^3+(-10^3)

{n(n+1)/2}^2={10(10+1/2)}^2. ={10(10+1)/2}^2

={5(11)}^2

=55^2

=3025