Rút gọn biểu thức:
P = 12.(52 + 1)(54 + 1)(58 + 1)(516 + 1)
P = 12.(52 + 1)(54 + 1)(58 + 1)(516 + 1)
= 12.(52 + 1)( 52 – 1)( 54 + 1)( 54 + 1)( 58 + 1)(516 + 1)
= 12.(54 - 1)( 54 + 1)( 58 + 1)(516 + 1)
= 12.( 58 - 1)( 58 + 1)(516 + 1)
= 12.(516 - 1)(516 + 1) = 1/2 (532 - 1)
-- Mod Toán 8
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