# SPM Additional Mathematics 2017, Paper 2 (Question 1 – 3)

Question 1:
Solve the following simultaneous equations:
x – 3y = 1,
x2 + 3xy + 9y2 = 7

Solution:

Question 2:
It is given that the equation of a curve is $y=\frac{5}{{x}^{2}}.$
(a) Find the value of $\frac{dy}{dx}$ when x = 3.
(b) Hence, estimate the value of $\frac{5}{{\left(2.98\right)}^{2}}.$

Solution:
(a)

(b)