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1.6 Differentiation

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Question 46

The pressure $P$ (in pascals) within a reaction vessel varies with time $t$ (in seconds) according to the function

P(t) = t^3 - ct^2 + 3t - 8

where $c\,$ is a positive constant.

Find, in simplest form, (i) $P^{'} (t)$ (ii) $P^{''} (t)$

[2]

The curve with equation $y = P^{'} (t)$ intersects the curve with equation $y = P^{''} (t)$ at the points $A\,$ and $B$ .

Given that the $t$ -coordinate of $A\,$ is 5,

find the value of $c$ .

[2]

Hence find the coordinates of $B$ .

[3]

Markscheme

1.6 Differentiation Questions

A Level
Maths
1.6 Differentiation

115 exam-style questions on CCEA A Level Maths 1.6 Differentiation, covering 1.6.1 Differentiation, 1.6.2 Differentiation, 1.6.3 Differentiation, 1.6.4 Differentiation, 1.6.5 Differentiation, 1.6.6 Differentiation, and 1.6.7 Differentiation. Each one has a worked solution and a mark scheme showing where the marks go.

1.6 Differentiation

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1.6 Differentiation

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Question 46

The pressure $P$ (in pascals) within a reaction vessel varies with time $t$ (in seconds) according to the function

P(t) = t^3 - ct^2 + 3t - 8

where $c\,$ is a positive constant.

Find, in simplest form, (i) $P^{'} (t)$ (ii) $P^{''} (t)$

[2]

The curve with equation $y = P^{'} (t)$ intersects the curve with equation $y = P^{''} (t)$ at the points $A\,$ and $B$ .

Given that the $t$ -coordinate of $A\,$ is 5,

find the value of $c$ .

[2]

Hence find the coordinates of $B$ .

[3]

Markscheme

1.6 Differentiation Questions

A Level
Maths
1.6 Differentiation