Final answer:
The nth term of the sequence alternates between cubes and powers of 2 raised to the power of 3.
Step-by-step explanation:
To work out the expression for the nth term of this sequence, we need to identify a pattern. Looking at the sequence, we can observe that the terms alternate between cubes (raised to the power of 3) and powers of 2 (raised to the power of 3). The expression for the nth term would be:
n-1 if n is even
n^3 if n is odd
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