SPM 2020 Add Maths Paper 1, Question 11Linear Law

Solved on video in English and Bahasa Melayu · 3 marks · Form 4, Linear Law · 3:55 video

The question

Diagram 4 shows the graph of a straight line of log_3 y against log_3 x. It is given that x and y are related by y - 27x^h = 0. The straight line passes through the point (k + 2, 5). Express k in terms of h.

[3 marks]

SPM 2020 Add Maths Paper 1, Question 11: the question as drawn in Eduly's video3:55

Step 1

Rearrange: y = 27 x^h.

5 more steps, each with the reason for it, in the full solution

Final answer

k = 2/h - 2

Where students lose marks

Watch out: after 5 = h(k + 2) + 3, subtract 3 to get 2. Do not add 3 to get 8.

Watch every step of this question solved on video (3:55), with the reason behind each step and a box that checks your own answer.

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