O-LevelAdditional MathematicsSeries4037/22 · May/June 2021 · Q12 Marks
Using the binomial theorem, expand (1+e2x)4, simplifying each term.
- Using the binomial theorem, expand (1+e2x)4, simplifying each term.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.
- B2 mark final answer for B2
- B1 for any 3 correct simplified terms in a sum or all 5 simplified terms listed but not summed or for a correct, simplified expansion that is not their final answer
- or M1 for a correct unsimplified expansion e.g. 1+4e2x + (4×3/2)(e2x)² + (4×3×2/6)(e2x)³ + (e2x)⁴
- If 0 scored, SC1 for a complete, correct, simplified expansion as final answer found by multiplying out the brackets
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