Use the rules of differentiation to to find the derivatives of the functions: f(r) = 5xª – 10x-2 + 9x²/3 (b) g(x) = 1²+2x+3 12+2 (c) h(x) = (x² + 3x)7 (d) k(x) = (3x? – 3x)6 - V4r² + 5

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