Question

find the sum of the cubes of 7 natural numbers without finding the cube of each number ​

Answer 1

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Answer 2

$solution$

Given: - first 7 natural number.

To find:- sum of cubes.

solution: Let first Inatural no.is.

= 1³+2³+3³ +43 +5³ +6³ +73

= 1 + 8 +27 +64 +125+216*343

784.

Hence, sum of first 7 natural number is

=784

please refer to the attachment anu