Q1. Each of the following curves cuts out regions above and below the x-axis between the given points (see Lecture 8.2). Find the total area enclosed by each curve and the x-axis between the given points. (i) f(x) = x – 9x2 + 18x between r 0 and r = 6. (ii) f(x) = 3 cos(x) between r = - and r = %3D %3D -

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