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Use the ratio test to determine convergence or divergence. If the ratio test is inconclusive, use...

Use the ratio test to determine convergence or divergence. If the ratio test is inconclusive, use another method to determine convergence or divergence.

∞ (−1)n(n!)2
/
(7n)!
n = 1

Its the series from 1 to infinity of

(-1)^n times (n!)^2 divided by (7n)!

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