1.2.3......9-1.2.3....8-1.2.3.....8.8 mng giúp với ạ
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
\(A=1.2.3...9-1.2.3...8-1.2.3...8.8\)
\(=1.2.3...8.\left(9-1-8\right)\)
\(=1.2.3...8.0\)
\(=0\)
giúp tui mới
a, A=1.2.3...9-1.2.3...8-1.2.3...8.8
giúp mới nha
A = 1.2.3....9 - 1.2.3...8 - 1.2.3.....8.8
thuc hien phep tinh
a A=1.2.3....9-1.2.3....8-1.2.3...8.8
\(1.2.3.....9-1.2.3.....8-1.2.3...8.8\)
Giair nhanh mình tick!
1.2.3....9-1.2.3....8-1.2.3...8.8= 1.2.3....9-(12.3....8+1.2.3...8.8)=1.2.3...9-(1.2.3....8(1+8)=1.2.3....9-1.2.3....9=0
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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 ~
1.2.3. ..... .9-1.2.3. ...... .8-1.2.3. .... .7.8^2
mong mọi người sẽ giúp
1.2.3....9 - 1.2.3.....8 - 1.2.3...7.82
= 1.2.3.4.5.6.7.8( 9 - 1 - 8)
= 1.2.3.4.5.6.7.8.0
= 0
1.2.3....9 - 1.2.3.....8 - 1.2.3...7.82
= 1.2.3.4.5.6.7.8( 9 - 1 - 8)
= 1.2.3.4.5.6.7.8.0
= 0
a)1+2-3-4+5+6-7-8+...-1999-2000+2001+2002-2003
b)1.2.3...9-1.2.3....8-1.2.3....7.82
Làm hộ em với ạ