Using the substitution u = t - 1/t, the integral ∫ (t² + 1)/(t⁴ + 1) dt reduces to

Lagos State University MAT102 2025 past question

1. ∫ du/(u² + 1)
2. ∫ du/(u² + 2)
3. ∫ du/(u² + 3)
4. ∫ du/(u² + 4)

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