QUESTION 4 a) The numbers 3, x, (x + 6) form the first 3 terms of a positive geometric sequence. Find
i)
ii)
the possible value(s) of x
the tenth term of the sequence
5+6 2 marks
[2 marks]
[3 marks]
S
b) Let A =
6 1 1 2
2 3 -1 and B
1-3 1 – 2
-8
3
4.
e
3x1
i)
Write down the inverse of A V
[6 marks]
ii) Find a matrix X such that AX = B ✓
[4 marks]
c) Sketch the graph of the following polynomial and state the domain and the range.
22
f(x) = -(x + 3)(x + 2)(x - 1)3
0
3x3 ARV
ferse
7
15 marks]