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Given that y=4x^3-(5/x^2) what is dy/dx in it's simplest form?

y = 4x^3-5x^-2 dy/dx = 12x^2+10x^-3

Answered by Trishul P. • Maths tutor

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Show that the curve with equation y=x^2-6x+9 and the line with equation y=-x do not intersect.

Three forces of magnitude 50N, PN, QN all act in a horizontal plane in equilibrium. The diagram shows the forces. DIAGRAM: QN = EAST, 50 = SOUTH, PN = 120 DEGREES ANTICLOCKWISE FROM QN a) Find P. b) Find Q.

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