\(1.2.3.....9-1.2.3.....8-1.2.3...8.8\)
Giair nhanh mình tick!
A= 1.2.3...9- 1.2.3...8-1.2.3...8.8
=1.2.3...8(9-1-8)
=1.2.3...8.0=0
Chúc bạn học tốt
\(A=1.2.3...9-1.2.3...8-1.2.3...8.8\)
\(=1.2.3...8.\left(9-1-8\right)\)
\(=1.2.3...8.0\)
\(=0\)
A = 1.2.3....9 - 1.2.3...8 - 1.2.3.....8.8
1.2.3......9-1.2.3....8-1.2.3.....8.8 mng giúp với ạ
=1*2*3*...*8(9-1)-1*2*3*...*8*8
=0
thuc hien phep tinh
a A=1.2.3....9-1.2.3....8-1.2.3...8.8
giúp tui mới
a, A=1.2.3...9-1.2.3...8-1.2.3...8.8
giúp mới nha
1.2.3...8.9 -1.2.3...8 -1.2.3...8.8
\(1.2.3...8.9-1.2.3...8-1.2.3...8.8\\ =1.2.3.4...7\left(9-1-8\right)\\ =0.1.2...7=0\)
Chúc bn học tốt
Tính
A = 1.2.3...8.9 - 1.2.3...7.8 - 1.2.3...8.8
\(A=1.2.3.4...8.9-1.2.3.4...7.8-1.2.3...8.8\)
\(A=1.2.3...8.\left(9-1-8\right)\)
\(A=1.2.3...8.9.0\)
\(A=0\)
Vậy \(A=0\)
~ Học tốt ~
tính nhanh 1.2.3....9 - 1.2.3....8 - 1.2.3......8^2
nhưng bạn ơi mk cần cách tính làm sao cho nhanh
mk vẫn thắc mắc sao 1.2.3.....9- 1.2.3.4.8^2 lại bằng 1.2.3.4.5....9
1.2.3...9-1.2.3...8-1.2.3...8^2
Giải thích giùm mình nha
1.2.3...9 - 1.2.3...8 - 1.2.3...82
= 1.2.3...8.(9 - 1) - 1.2.3...82
= 1.2.3...8.8 - 1.2.3...8.8
= 0
1.2.3...9 - 1.2.3...8 - 1.2.3...82
= 1.2.3...8.(9 - 1) - 1.2.3...82
= 1.2.3...8.8 - 1.2.3...8.8
= 0
\(1.2.3.....9-1.2.3.....8-1.2.3.....8^2\)
\(=1.2.3.....8.\left(9-1\right)-1.2.3.....8.8\)
\(=1.2.3.....8.8-1.2.3.....8.8\)
\(=0\)