b: \(B=18\cdot3+16\cdot81\cdot79-8\cdot5\)
=102398
b: \(B=18\cdot3+16\cdot81\cdot79-8\cdot5\)
=102398
rút gọn : 30x10^8x5^4-25^6x16^2x3:75^3x20^4+3^3x5^10x32^2
a)3x5^2-27:3^2-5^2x4-18:3^2
b)2x -1 là bội của x-3
c)205-[ 1200-(4^2 - 2x3)^3] :40
rút gọn các phân số sau
a/ 2^3x3^4 / 2^2x3^2x5
2^4x5^2x11^2x7 / 2^3x5^3x7^2x11
b/ 121x75x130x169 / 39x60x11x198
c/1998x1990+3978 / 1992x1991-3984
A=5/9+2/15-6/9
B=2/7-3/8+4/7+1/7-5/8+5/15
C=3/5+1/15+1/57+1/3-2/9-3/4-1/36
D=1/1x2+1/2x3+1/3x4+...+1/99x100
E=1-3/1x3-3/3x5-3/5x7-...-19
help plssssssss
tính:
a) \(\frac{1^2}{1x2}+\frac{2^2}{2x3}+\frac{3^2}{3x4}+...+\frac{100^2}{100x101}\)
b) \(\frac{2^2}{1x3}+\frac{3^2}{2x4}+\frac{4^2}{3x5}+...+\frac{59^2}{58x60}\)
Thực hiện phép tính:
A=5x(2^2x3^2)^9x(^*2)^6-2x(2^2x3)^14x3^4 / 5x2^28x3^18-7x2^29x3^18
tinh
a)A=1x2+2x3+3x4+............+99x100
b)B=1x3+3x5+5x7+............97x99
c)C=1x2x3+2x3x4+..............98x99x100
Rút gọn
a) \(\frac{2^3x3}{2^2x3^2x5}\)
b) \(\frac{\left(-2\right)^3x3^3x5^5x7x8}{3x2^4x5^3x14}\)
\(3^2x3^3x3^6+4^5x4^7+5^3x5^6=???\)
(Viết dưới dạng lũy thừa hộ mình nhé. Ai đúng mình tk)