Answer:
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For finding, the sum of last ten terms, we write the given AP in reverse order i.e, 126, 124, 122,..., 12, 10, 8
Hence,first term (a) = 126, common difference, (d) = 124 - 126
So,
The compound inequality x < -2 or x ≥ 3 is represented by x ∈ (-∞, -2) ∪ [3, ∞)