Câu hỏi của Nguyễn Bảo Nhi

Question

1) Thực hiện phép tính:

M = (2^9 + 2^7 + 1)(2^23 - 2^21 + 2^19 - 2^17 + 2^14 + 2^10 + 2^5 - 2^7 + 1)

Aki Michio · Accepted Answer

$M=\left(2^9+2^7+1\right).\left(2^{23}-2^{21}+2^{19}-2^{17}+2^{14}-2^{10}+2^9-2^7+1\right)$

$M=2^{32}+\left(2^{23}+2^{23}-2^{24}\right)+\left(2^{18}-2^{17}-2^{17}\right)+\left(2^9+2^9-2^{10}+1\right)$

$M=2^{32}+1$Câu trả lời: $M=\left(2^9+2^7+1\right).\left(2^{23}-2^{21}+2^{19}-2^{17}+2^{14}-2^{10}+2^9-2^7+1\right)$

$M=2^{32}+\left(2^{23}+2^{23}-2^{24}\right)+\left(2^{18}-2^{17}-2^{17}\right)+\left(2^9+2^9-2^{10}+1\right)$

$M=2^{32}+1$

Bài 3: Những hằng đẳng thức đáng nhớ