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Question

What is the value of 4 + 32 + 108 + …. + 4000?

EXPLANATION

4 + 32 + 108 + ... + 4000 = 4(1 + 8 + 27 + .... + 1000)

= 4 (13 + 23 + 33 + ….. + 103)

=4×10×1122

= 4 × 552 = 12100

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