Question

Find the value of (0.11)3 + (0.22)3 + ... + (0.99)3

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Answer 1

Answer:

11 * 1 / 100)3 + (11 * 2/ 100)3 + ... + (11 * 9 / 100)3

= (11 / 100)3 [(1)3 + (2)3 + ... + (9)3]

= 1331 * 2025 / 100 * 100 * 100

= 1.331 * 2.025 = 2.695