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BBB The interval in which y = x + 81x increases is BBB

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BBB Find the interval in which y = e5xx + 12 increases. BBB

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BBB Find the interval for which the function f(x) = x^{2} + 256x2 increases. BBB

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BBB Find the interval in which f(x) = 52x13 + x43 increases. BBB

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BBB Find the interval in which f(x) = 4x^{4}  32x^{2} + 37 increases. BBB

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BBB For all real values of x, f(x) = 6x  cos 3x is BBB

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BBB Find the interval in which y = 6x^{3}  27x^{2} + 36x + 46 decreases. BBB

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BBB Which of the following is the largest interval in which y = 4x^{2} + ln x decreases? BBB

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BBB Which of the following is the largest interval in which y =  tan^{1}3x decreases ? BBB

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BBB The function f(x) = (25  x^{2})^{2} decreases for all x ∈ ff

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ff Find the interval in which f(x) = (x  4)^{2} + (x  10)^{2} decreases. ff

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ff The interval in which y = x + 49x increases is ff

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ff Find the interval in which y = e6xx + 39 increases. ff

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ff In which interval does the function f(x) = 6 + 24x  18x^{2} + 4x^{3} increase? ff

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ff Find the interval for which the function f(x) = x^{2} + 2401x2 increases. ff

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ff Find the interval in which f(x) = 64x13 + x43 increases. ff

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ff Find the interval in which f(x) = 2x^{4}  36x^{2} + 13 increases. ff

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ff Find the interval in which y = sin (cos x), x ∈ (0, 2π) increases. ff

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ff In the interval (e, ∞), the function f(x) = x^{x} is ff

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ff For all real values of x, f(x) = 7x  cos 4x is ff

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ff Find the interval in which y = 4x^{3}  30x^{2} + 72x + 45 decreases. ff

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ff Which of the following is the largest interval in which y = 2x^{2} + ln x decreases? ff

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ff Which of the following is the largest interval in which y =  tan^{1}2x decreases ? ff

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ff The function f(x) = (64  x^{2})^{2} decreases for all x ∈ ff

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ff Find the interval in which f(x) = (x  10)^{2} + (x  14)^{2} decreases. ff

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ff f(x) = (x  2)^{2}(x + 1)^{3} decreases in the interval ff

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ff In the interval (0, π2), f(x) = cos (sin x) is ff

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ff In the interval (3π4, π4), f(x) = sinx  cos x is ff

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ff For all real values of x, f(x) =  sinh (sinhx) is ff

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