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6. Find the intervals in which the following functions are strictly increasing ordecreasing:(a) x2 + 2r- 5(c) -2r3- 9x2- 12r +1e) (x 1)3 (x - 3(b) 10 6r 2r2(d) 6-9x -x'

Answer» 6. Find the intervals in which the following functions are strictly increasing ordecreasing:(a) x2 + 2r- 5(c) -2r3- 9x2- 12r +1e) (x 1)3 (x - 3(b) 10 6r 2r2(d) 6-9x -x'


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