Factor the difference an+1 n /too 17n + 9 Jn=1 an+1 = an = - a, to show that the given sequence {a,} is strictly increasing or strictly decreasing. 9 (17n +9)(17n +26)* 17 (17n +9)(17n +26)* 9 (17n +9)(17n +26)' 9 (17n9)(17n +26)' ; strictly increasing ; strictly increasing ; strictly decreasing ; strictly increasing 9 (17n - 9)(17n - 26) strictly decreasing

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