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A-Level CAIE Mathematics A23.4 DifferentiationQuestion Bank

Question 1

[Maximum number: 5]

Find the exact coordinates of the points on the curve y=x213xy=\frac{x^{2}}{1-3 x} at which the gradient of the tangent is equal to 8 .

Question 2

The parametric equations of a curve are

x=t2t+3,y=e2tx=\frac{t}{2 t+3}, \quad y=\mathrm{e}^{-2 t}

Find the gradient of the curve at the point for which t=0.

Question 2

The curve y=lnxx3y=\frac{\ln x}{x^{3}} has one stationary point. Find the x-coordinate of this point.

Question 2

[Maximum number: 5]

Find the exact coordinates of the stationary point on the curve with equation y=5xe12xy=5 x \mathrm{e}^{\frac{1}{2} x}.

Question 2

[Maximum number: 4]

The parametric equations of a curve are

x=3(1+sin2t),y=2cos3tx=3\left(1+\sin ^{2} t\right), \quad y=2 \cos ^{3} t

Find dy dx\frac{\mathrm{d} y}{\mathrm{~d} x} in terms of t, simplifying your answer as far as possible.

Question 2

The equation of a curve is y=e2x1+e2xy=\frac{\mathrm{e}^{2 x}}{1+\mathrm{e}^{2 x}}. Show that the gradient of the curve at the point for which x=ln3x=\ln 3 is 950\frac{9}{50}.

Question 2

[Maximum number: 4]

Find dy dx\frac{\mathrm{d} y}{\mathrm{~d} x} in each of the following cases:

Question 2(i)

(a)

y=ln(1+sin2x)y=\ln (1+\sin 2 x),

[ 2 ]

Question 2(ii)

(b)

y=tanxxy=\frac{\tan x}{x}.

[ 2 ]

Question 2

[Maximum number: 5]

Find the exact coordinates of the stationary point of the curve y=e2xsin2xy=\mathrm{e}^{2 x} \sin 2 x for 0x12π0 \leqslant x \leqslant \frac{1}{2} \pi

Question 3

[Maximum number: 5]

The parametric equations of a curve are

x=2t+sin2t,y=ln(1cos2t).x=2 t+\sin 2 t, \quad y=\ln (1-\cos 2 t) .

Show that dy dx=cosec2t\frac{\mathrm{d} y}{\mathrm{~d} x}=\operatorname{cosec} 2 t.

Question 3

[Maximum number: 5]

The equation of a curve is cos3x+5siny=3\cos 3 x+5 \sin y=3.
Find the gradient of the curve at the point (19π,16π)\left(\frac{1}{9} \pi, \frac{1}{6} \pi\right).

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