Bài 1: Tìm x:a)\(\left(x+\frac{1}{4}\right)^2+\frac{5}{6}=\frac{7}{8}\)b) \(\left(3x+\frac{3}{5}\right).\left(\left|x\right|-\frac{1}{4}\right)=0\)Bài 2: Cho \(A=\frac{1}{5^2}+\frac{1}{6^2}+\frac{1}{7^2}+...+\frac{1}{2017^2}\).Chứng tỏ rằng \(A<...
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Bài 1: Tìm x:
a)\(\left(x+\frac{1}{4}\right)^2+\frac{5}{6}=\frac{7}{8}\)
b) \(\left(3x+\frac{3}{5}\right).\left(\left|x\right|-\frac{1}{4}\right)=0\)
Bài 2: Cho \(A=\frac{1}{5^2}+\frac{1}{6^2}+\frac{1}{7^2}+...+\frac{1}{2017^2}\).Chứng tỏ rằng \(A< \frac{1}{4}\)
Z, x ≠ 96)