\(\left(7^{2003}+7^{2002}\right):7^{2001}\)
\(=\left(7^{2003}+7^{2002}\right).\frac{1}{7^{2001}}\)
\(=\frac{7^{2003}}{7^{2001}}+\frac{7^{2002}}{7^{2001}}\)
\(=7^2+7=49+7=56\)
\(\left(7^{2003}+7^{2002}\right):7^{2001}\)
\(=\left(7^{2003}+7^{2002}\right).\frac{1}{7^{2001}}\)
\(=\frac{7^{2003}}{7^{2001}}+\frac{7^{2002}}{7^{2001}}\)
\(=7^2+7=49+7=56\)
tinh nhanh
S= 1-2-3+4+5-6-7+8+.....+2001-2002-2003+2004
tinh nhanh
(7^2003+7^2002):7^2002
(7 ^2003 +7^2002) : 7^2001
a) 1 - 2 - 3 + 4 +5 - 6 - 7 + ..... + 2001 - 2002 -2003 + 2004
b) 1 + 2 - 3 - 4 + 5 + 6 - 7 - 8 + ..... + 2001 + 2002 - 2003 - 2004
Tính nhanh tổng đại số sau:
a) S=1-2-3+4+5-6-7+8+...+2001-2002-2003+2004
b) S=1+2-3-4+5+6-7-8+9+...+2002-2003-2004+2005+2006
thuc hien cac phep tinh
1-2-3+4+5-6-7+...+2001-2002-2003+2004
Tính nhanh :
( 7 2003 + 7 2002 ) : 7 2001
Ai làm rõ ràng - nhanh - đúng nhất sẽ được tick
(72003+72002)÷(72001×7)
(7200372002)÷(72001×7)