\(\frac{3^6\times45^4-15^3\div5^9}{27^4\div23^5+45^6}\)
\(\frac{3^6\times45^4-15^3\div5^9}{27^4\times25^3+45^6}\)
So sánh giùm mik nha.
a) \(\frac{3}{-4}v\text{à}\frac{-1}{-4}\)
b) \(\frac{15}{17}v\text{à}\frac{25}{27}\)
c) \(\frac{-9}{6}v\text{à}\frac{6}{-4}\)
d) \(\frac{2000}{2001}+\frac{2001}{2002}v\text{à}\frac{2000+2001}{2001+2002}\)
Lm đc bài nào thì giải giúp mik vs nha.
Bài 1: Thực hiện phép tính.
D = \(\dfrac{6^{12}+15\text{×}2^{12}\text{×}3^{11}}{12\text{×}6^{11}+7\text{×}8^4\text{×}27^4}\)
Bài 2: Tìm x,y ∈ N biết:
a) 7 × 3x + 15 = 78
b) (3x - 2)3 - 11 = 53
c) (x + 3)4 bé hơn hoặc bằng 80
d) 7 × 5x + 1 - 3.5x + 1 = 860
e) 2x + 24 = 5y
tính:
\(E=\frac{3^6.45^4-15^{13}.5^{-9}}{27^4.25^3+45^6}\)
\(\frac{3^6.45^4-15^{13}.5^9}{27^4.25^3+45^6}\)
tính\(\frac{3^6.45^4-15^{13}.5^{-9}}{27^4.25^3+45^6}\)
1) Tính nhanh
a) A=\(\frac{3}{11\text{x}13}+\frac{3}{13\text{x}15}+\frac{3}{15\text{x}17}+...+\frac{3}{97\text{x}99}\)
b) B=\(\frac{4}{7\text{x}31}+\frac{6}{7\text{x}11}+\frac{9}{10\text{x}41}+\frac{7}{10\text{x}57}\)
3) Chứng tỏ phân số \(\frac{8n+5}{6n+4}\)tối giản với mọi số nguyên khác 0
A=\(\frac{1\text{x}2+2\text{x}4+3\text{x}6+...+n\text{x}2n}{3\text{x}4+6\text{x}8+9\text{x}12+...+x}\)