Các câu hỏi tương tự
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)
a)1.2+2.3+3.4+...+19.20
b)9+99+999+...+999...9(100 so 9)
c)999...9x222...2(100 so 9 va 100 so 2)
SOS!!!
9+99+999+...+99...99 9(n chu so 9)
33....3 . 99....9
Co 50 chu so 3 va co 50 chu so 9
99 -3 x 99 -6 x 99-9 x .... co 33 so hang
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!
So sánh A và B biết : A= 1+7+7^2 +......+7^100 / 1 + 7 + 7^2 +..... +7^99 ; B = 1 + 9 + 9^2 + 9^3 +......+9^100 / 1+9+9^2+9^99
2 tháng 4 2023 lúc 19:23
so sánh
P=\(\dfrac{1+7^2+7^3+...+7^{100}}{1+7^2+7^3+...+7^{99}}\)
Q=\(\dfrac{1+9^2+9^3+...+9^{100}}{1+9^2+9^3+...+9^{99}}\)