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Date November 2020 Marks available 2 Reference code 20N.2.SL.TZ0.S_1
Level Standard Level Paper Paper 2 Time zone Time zone 0
Command term Find Question number S_1 Adapted from N/A

Question

Consider the function fx=x2+x+50x, x0.

Find f1.

[2]
a.

Solve fx=0.

[2]
b.

The graph of f has a local minimum at point A.

Find the coordinates of A.

[2]
c.

Markscheme

* This question is from an exam for a previous syllabus, and may contain minor differences in marking or structure.

attempt to substitute x=1       (M1)

eg       f1, 12+1+501

52  (exact)       A1   N2

[2 marks]

a.

-4.04932

-4.05       A2   N2

[2 marks]

b.

2.76649, 28.4934

A2.77, 28.5       A1A1   N2

[2 marks]

c.

Examiners report

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

Syllabus sections

Topic 2—Functions » SL 2.4—Key features of graphs, intersections using technology
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Topic 2—Functions

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