Vector: Mid-point Theorem
(Mid-point theorem) If a ⃗ and b ⃗ be the position vectors of A and B respectively, then the position vector of C, the middle point of AB is 1⁄2 (a ⃗+b ⃗ ).
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Please watch: "If 𝒙^𝒂.𝒙^𝒃=(𝒙^𝒂 )^𝒃, show that 𝒂/𝒃+𝒃/𝒂=𝒂𝒃−𝟐."
https://www.youtube.com/watch?v=rZcUcisuYSc
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