999999999999:99999999
999999999999+999999999999
999999999999 + 999999999999 = 19999999999998
999999999999 + 999999999999 = ?
999999999999+999999999999
tông này là 999999999999999
k mình nha cậuNguyễn Quang Huy
99999999+99999999=
Tính: \(T=9^9+9^{99}+9^{999}+9^{9999}+9^{99999}+9^{999999}+........+9^{9999999999}+9^{9999999999}+9^{999999999999}+9^{999999999999}\)
Rút gọn biểu thức :
(99999999+22222222222222222^2)(99999999-22222222222222222^2)
A=99999999...99999999(n cs 9)
CMR : A chia hết cho 9
999999999999* 99999999999
999999999999-?=2