\(-\left(\dfrac{3}{5}+\dfrac{3}{4}\right)-\left(\dfrac{-3}{4}+\dfrac{2}{5}\right)\)

\(\dfrac{45^{10}.5^{20}}{75^{15}}\)Giải rõ ra hộ mình ~~~~

Tìm giá trị của các biểu thức sau:

a) 2 mũ 7 x 9 mũ 3/6 mũ 5 x 8 mũ 2

d)6 mũ 3+3x6 mũ 2+3 mũ 3/-13

Tính \(3\dfrac{17}{24}\)+\(\left(2\dfrac{8}{15}-4\dfrac{8}{15}\right):\left(2\dfrac{11}{30}-\dfrac{11}{30}\right)\)

\(0,5:\sqrt{625}-\sqrt{\dfrac{4}{25}}+0.18\left(\sqrt{1\dfrac{9}{16}}-\sqrt{\dfrac{9}{16}}\right)\)

Tính bằng cách hợp lí :

\(\left(\dfrac{4}{9}-\dfrac{5}{11}\right):\dfrac{3}{10}+\left(\dfrac{3}{9}-\dfrac{9}{11}\right):\dfrac{3}{10}-\left(\dfrac{2}{9}-\dfrac{8}{11}\right).\left(\dfrac{-10}{3}\right)\)

Các bn giúp mik vs mai mik nộp bài r

Tìm số tự nhiên n

\(2n+2^{n+1}=24\)

\(\dfrac{125}{\left(-5\right)^n}=-25\)

\(\dfrac{n-2}{4}=\dfrac{1}{2}\)

Tìm x biết

a,(x-3)2=1

b,(x-\(\dfrac{1}{7}\))2=0

c,(2x+3)3=-27

d,(x+\(\dfrac{1}{2}\))2=\(\dfrac{1}{4}\)

e,-(5+35x)2=36

Biết rằng 12+ 22 +-.+102 = 385

Tính nhanh ( 122 + 142 + 162 + 182 + 202)- ( 12 + 32 + 52 + 72 + 92)

Tính

\(A=\left(1-\dfrac{1}{2^2}\right)\left(1-\dfrac{1}{3^2}\right)\left(1-\dfrac{1}{4^2}\right)...\left(1-\dfrac{1}{n^2}\right)\left(n\in N,n\ge2\right)\)

\(\dfrac{16^3.3^{10}+120.6^9}{4^6.3^{12}+6^{11}}\)