Câu hỏi của Thảo Vân

Question

Mn ơi, giúp mình với

Cho A= (900-1^2).(900-2^2).(900-3^2)....(900-70^2)

Mình đang cần đáp án gấp (có cả cách làm luôn nhé), mong mn giúp mình

Mashiro Shiina · Accepted Answer

$a=\left(900-1^2\right)\left(900-2^2\right)\left(900-3^2\right)...\left(900-70^2\right)$

$a=\left(900-1^2\right)\left(900-2^2\right)\left(900-3^2\right)....\left(900-30^2\right)....\left(900-70^2\right)$

$a=\left(900-1^2\right)\left(900-2^2\right)\left(900-3^2\right)....0....\left(900-70^2\right)$

$a=0$Câu trả lời: $a=\left(900-1^2\right)\left(900-2^2\right)\left(900-3^2\right)...\left(900-70^2\right)$

$a=\left(900-1^2\right)\left(900-2^2\right)\left(900-3^2\right)....\left(900-30^2\right)....\left(900-70^2\right)$

$a=\left(900-1^2\right)\left(900-2^2\right)\left(900-3^2\right)....0....\left(900-70^2\right)$

$a=0$

Thảo Vân · Answer

Minh ko btCâu trả lời: Minh ko bt

Violympic toán 6