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Date November 2016 Marks available 3 Reference code 16N.2.sl.TZ0.4
Level SL only Paper 2 Time zone TZ0
Command term Hence Question number 4 Adapted from N/A

Question

Let f(x)=xex and g(x)=3f(x)+1.

The graphs of f and g intersect at x=p and x=q, where p<q.

Find the value of p and of q.

[3]
a.

Hence, find the area of the region enclosed by the graphs of f and g.

[3]
b.

Markscheme

valid attempt to find the intersection     (M1)

egf=g, sketch, one correct answer

p=0.357402, q=2.15329

p=0.357, q=2.15     A1A1     N3

[3 marks]

a.

attempt to set up an integral involving subtraction (in any order)     (M1)

egqp[f(x)g(x)]dx, qpf(x)dxqpg(x)dx

0.537667

area=0.538     A2     N3

[3 marks]

b.

Examiners report

[N/A]
a.
[N/A]
b.

Syllabus sections

Topic 2 - Functions and equations » 2.7 » Solving equations, both graphically and analytically.
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