Sao chữ số này có tới 2 mũ vậy bạn! Tring lũy thừa thì số mũ chỉ có 1 thui hay sao chứ? Bạn xem lại đề nha
999999^9999=9992k+1=(...9)
chuẩn 100%
Tim chu so tan cung cua so 57999 va 931999
GIUP MK CAU NAY VS
a. Tim chu so a va so tu nhien x sao cho (12 +3x)2 = 1a96
b. Tinh gia tri bieu thuc : S= 9+99+999+9999+....+99..99(2017 so 9)
thu gon tong sau
9 +99+999+9999+...+999...9/100 chu so 9
Tinh tong
a) D= 9+99+999+9999+...+999....9 (50 chu so 9)
b) E= 9+99+999+...+999...9 (200 chu so 9)
c)C=1−2^2+3^2−4^2+...+99^2−100^2
d) G= 1.1!+ 2. 2!+3.3!+ ... +100.100!
Tinh tong
a) D= 9+99+999+9999+...+999....9 (50 chu so 9)
b) E= 9+99+999+...+999...9 (200 chu so 9)
c) C=\(1-2^2+3^2-4^2+...+99^2-100^2\)
d) G= 1.1!+ 2. 2!+3.3!+ ... +100.100!
CMR; A chia het cho 10 , biet ;
A = 9+99+999+.....+9999...99( so cuoi cung co 50 chu so 9)
Tinh tong
a) D= 9+99+999+9999+...+999....9 (50 chu so 9)
b) E= 9+99+999+...+999...9 (200 chu so 9)
c) C=\(1-2^2+3^2-4^2+5^2-6^2+...+99^2-100^2\)
d) G= 1.1!+ 2. 2!+3.3!+ ... +100.100!
tim so du cua 9999...9(2008 chu so 9) khi chia cho 54
tim ket qua cua phep nhan : 333...3 * 999...9 10 chu so 3 va 10 chu so 9
