2x 3 9x 2 12x 1 is decreasing July 8, 2019 16 32 64 128 2x 3 9x 2 12x 1 increasing or decreasing The interval in which the function 2x 3 9x 2 12x 1 is decreasing The interval in which the function fx 2x 3 9x 2 12x 1 is decreasing 2 x 13 2^x + 8^x = 130 2 x 2 5 2x 9
