[Toán 8] Chứng minh

L

luffy_1998

$x = y + 1 \rightarrow x - y = 1$
$\rightarrow VT = (x - y)(x + y)(x^2 + y^2)(x^4 + y^4)(x^8 + y^8) = (x^2 - y^2)(x^2 + y^2)(x^4 + y^4)(x^8 + y^8) = (x^4 - y^4)(x^4 + y^4)(x^8 + y^8) = (x^8 - y^8)(x^8 + y^8) \\ = x^{16} - y^{16}$
 
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