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2-digit numbers less than 91 which are 1 less than a multiple of 10

2x - 20 = 32 20 - 3x = 8 6x - 8 = 16 -13 - 3x = -10

Use the ratio test to determine whether ∑n=14∞n+2n! converges or diverges. (a) find the ratio of successive terms. write your answer as a fully simplified fraction. for n≥14, limn→∞∣∣∣an+1an∣∣∣=limn→∞.