By finding a cubic equation whose roots are α, β and γ, solve the set of simultaneous equations α + β + γ = −1, α² + β² + γ² = 29, 1/α + 1/β + 1/γ = −1.
- By finding a cubic equation whose roots are α, β and γ, solve the set of simultaneous equations α + β + γ = −1, α² + β² + γ² = 29, 1/α + 1/β + 1/γ = −1.[8]
Mark scheme
Marking points from the official mark scheme (May/June 2017). The mark or mark type is shown in brackets.
- [M1A1]
- [M1A1 FT]
- [A1]
- [M1A1] Attempt to factorise cubic
- [A1] SR B1 for correct roots without working
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