Five marks exercise problems IV — task. Mathematics State Board, Class 10.

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Find the sum of the series

$(2^3 - 1) + (4^3 - 3^3) + (6^3 - 5^3) + …$ to:

(i)

$n$ terms

$=$

$i i^{i} + i i^{i}$

(ii)

$8$ terms

$=$

[Note: Insert variables and numbers in separate boxes]

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