Question

1³+2³+3³+...+9³ is equal to
a)729
b)2025
c)1331
d) none of these
please try to give a mathematical identity on this question and don't spam

Answer 1

Answer:

1cube +2 cube +3 cube +4 cube +5 cube +6 cube +7 cube +8 cube +9 cube = 1+8+27+64+125+216+443+513+729= 2126

Therefor its d) none of them

Answer 2

Answer:

hey mate

Ans-425

1³ - 2³ + 3³ - and so on.... + 9³ =

it should be like this. But please I'm not sure about my answer

So first of all we will use this identity for the solution [ a³ - b³ ] = ( a - b ) ( a² + ab + b² )

=> 1cube - 2cube

= 1³ - 2³

= -7

=> 3cube - 4 cube

= 3³ - 4³

= -37

=> 5 cube - 6 cube

= 5³ - 6³

= - 91

=> 7cube - 8 cube

= 7³ - 8³

= -169

So, 9³ = 729

-7 - 37 - 91 - 169 = -304

So, 729 - 304 = 425

So , answer is 425

Step-by-step explanation:

hope this helps you

mark me Brainlist