A-LevelMathematicsSeries9709/33 · May/June 2018 · Q14 Marks
Expand 4 / √(4-3x) in ascending powers of x, up to and including the term in x², simplifying the coefficients.
- Expand 4 / √(4-3x) in ascending powers of x, up to and including the term in x², simplifying the coefficients.[4]
Mark scheme
Marking points from the official mark scheme (May/June 2018). The mark or mark type is shown in brackets.
- M1 Obtain a correct unsimplified version of the x or x² term of the expansion of (4-3x)^(-1/2) or (1 - (3/4)x)^(-1/2)
- B1 State correct first term 2
- A1 + A1 Obtain the next two terms - (3/4)x + (27/64)x^2
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