Bài 1: Rút gọn biểu thức

\(A=\frac{2^{10}.13+2^{10}.65}{2^8.104}\)  \(B=\frac{15.3^{11}+4.27^4}{9^7}\)  \(C=\left(125^3.7^5-175^5:5\right):2016^{2017}\)

Bài 2: Tìm x:

a)\(\frac{1}{1.4}+\frac{1}{4.7}+\frac{1}{7.10}+...+\frac{1}{x.\left(x+3\right)}=\frac{6}{19}\)b)\(\left|\frac{3}{13}x^2+\frac{1}{2}\right|-\frac{3}{4}=\frac{5}{6}\)

Bài 1: Rút gọn biểu thức

\(A=\frac{2^{10}.13+2^{10}.65}{2^8.104}\)  \(B=\frac{15.3^{11}+4.27^4}{9^7}\)  \(C=\left(125^3.7^5-175^5:5\right):2016^{2017}\)

Bài 2: Tìm x:

a)\(\frac{1}{1.4}+\frac{1}{4.7}+\frac{1}{7.10}+...+\frac{1}{x.\left(x+3\right)}=\frac{6}{19}\)b)\(\left|\frac{3}{13}x^2+\frac{1}{2}\right|-\frac{3}{4}=\frac{5}{6}\)

1. Tìm x ϵ Q sao cho:

a) (2x-3). (x+1) < 0.

b) \(\left(x-\frac{1}{2}\right).\left(x+3\right)\)> 0.

2. Tính:

S=\(\frac{1}{3.5}+\frac{1}{5.7}+...+\frac{1}{999.1001}\)

3. Tìm x: Biết x không thuộc{-2; -5; -10; -17}

\(\frac{3}{\left(x+2\right).\left(x+5\right)}+\frac{5}{\left(x+5\right).\left(x+10\right)}+\frac{7}{\left(x+10\right).\left(x+17\right)}=\frac{x}{\left(x+2\right).\left(x+17\right)}\)

1. Tìm x ϵ Q sao cho:

a) (2x-3). (x+1) < 0.

b) \(\left(x-\frac{1}{2}\right).\left(x+3\right)>0\)

2.Tính:

S=\(\frac{1}{3.5}+\frac{1}{5.7}+...+\frac{1}{999.1001}\)

3.Tìm x: Biết x không thuộc{-2; -5; -10; -17}

\(\frac{3}{\left(x+2\right).\left(x+5\right)}+\frac{5}{\left(x+5\right).\left(x+10\right)}+\frac{7}{\left(x+10\right).\left(x+17\right)}=\frac{x}{\left(x+2\right).\left(x+17\right)}\)

\(A=2\frac{3}{7}:\left(-12\frac{1}{2}+15\frac{1}{7}\right).\left(3\frac{3}{10}\right)-\left(\frac{-34}{37}\right).\left(2\frac{1}{10}-4\frac{2}{5}\right)\)

\(B=-3\frac{1}{10}:\left(\frac{1}{2}-\frac{2}{5}\right)-2\frac{1}{28}:\left(\frac{2}{7}-\frac{3}{4}\right)\)

bài 2:Tìm x

a. \(-1\frac{2}{3}-\left|2x-1\right|:\frac{3}{5}=-2\)

b. \(\frac{x-7}{36}=\frac{-4}{7-x}\)

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