\(B=\frac{\left(2^4.3\right)^3.\left(2.5^2\right)^5}{\left(2^6\right)^2.\left(5^3\right)^2.\left(2.3.5\right)^3}\)
\(B=\frac{2^{12}.3^3.2^5.5^{10}}{2^{12}.5^6.2^3.3^3.5^3}\)
\(B=\frac{2^{12}.3^3.2^3.2^2.5^9.5}{2^{12}.5^9.2^3.3^3}\)
\(B=2^2.5=20\)
Vay B = 20
CMR: \(\frac{3}{1^2\cdot2^2}+\frac{5}{2^2\cdot3^2}+\frac{7}{3^2\cdot4^2}+...+\frac{97}{48^2\cdot49^2}+\frac{99}{49^2\cdot50^2}< 1\)
\(\frac{3}{10\cdot12}+\frac{3}{12\cdot14}+........+\frac{3}{48\cdot50}\)
tinh:\(\frac{3}{10\cdot12}+\frac{3}{12\cdot14}+...+\frac{3}{48\cdot50}\)
1, Tính
a, \(\frac{5}{2\cdot4}\)+\(\frac{5}{4\cdot6}\)+\(\frac{5}{6\cdot8}\)+.......+\(\frac{5}{48\cdot50}\)
HELP ME!!!!!!!!
tính
\(a,\left(-3\right)^3+\left(-3\right)^2-\frac{1}{3^7}\cdot81\)
\(b,\left(-\frac{1}{5}\right)^5\cdot125+5^4\)
H=\(\frac{1\cdot2\cdot3+2\cdot4\cdot6+3\cdot6\cdot9+5\cdot10\cdot15}{1\cdot3\cdot6+2\cdot6\cdot12+3\cdot9\cdot18+5\cdot15\cdot30}\)= ?
tính\(\frac{1}{1\cdot2\cdot3}+\frac{1}{2\cdot3\cdot4}+...\frac{1}{48\cdot49\cdot50}\)
tính giá trị biểu thức
a, 3^8 / 3^4 + 2^2 *2^3
b, 3* 4^2 -- 2 * 3^2
c, \(\frac{4^6\cdot3^4\cdot9^5}{6^{12}}\)
d, \(\frac{21^2\cdot14\cdot125}{35^36}\)
e,\(\frac{45^3\cdot20^4\cdot18^2}{180^5}\)
g, \(\frac{2^{13}+2^5}{2^{10}+2^2}\)
