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The sum of the first n terms of a sequence is given by Sₙ = 3n³ + 2n². Find the 6th term of the sequence.
- 309
- 720
- 101
- 295
Correct answer: 295
Solution
S₆ = 3*216 + 2*36 = 720 and S₅ = 3*125 + 2*25 = 425. Therefore T₆ = 720 - 425 = 295.
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