How would you use the following expression to approximate [(4-5x)/(1+2x)(2-x)] when x=5 (A2 pure)
So I cant really answer this question over text however, the method would be using partial fractions to split the two fractions into two, then using a binomial expansion, but the indicies will be negative so you'd have to be careful how you expand. Then once you have expanded the fractions you would simply plug 5 into the polynomial formed and that would be the answer. This question would be specifically for A2
Related Maths A Level answers
All answers ▸Differentiate y=x*ln(x^3-5)
How do you do integration by parts?
A rollercoaster stops at a point with GPE of 10kJ and then travels down a frictionless slope reaching a speed of 10 m/s at ground level. After this, what length of horizontal track (friction coefficient = 0.5) is needed to bring the rollercoaster to rest?
Sketch the curve y = (2x-1)/(x+1) stating the equations of any asymptotes and coordinates of the intersection with the axis. As an extension, what standard transformations from C1 could you use on y=1/x to get this curve?