document.write( "Question 563150: How can we show if the sequence αn = 2cos(nπ) is monotone or not? \n" ); document.write( "

Algebra.Com's Answer #364779 by richard1234(7193) $\"\"$ $\"About$

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2 cos (n*pi) is not monotonic. Monotonic means that the function is either strictly increasing or strictly decreasing. \n" ); document.write( "

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