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2022 IIMC keystage3-IWYMIC team Question 5

xIMC · 2022 IIMC keystage3-IWYMIC team

Question 5

If $ax+by=7$, $ax^2+by^2=49$, $ax^3+by^3=133$ and $ax^4+by^4=406$, then find the numerical value of $2022(x+y)+7(a+b)+2xy$.