京东 11.11 红包
7.10 Rational and irrational roots of polynomials 多项式方程有理数解作业、无理数解讲解
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Prealgebra lesson 4
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7.31 多项式除法Ch6作业、多项式方程的整数解
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7.15 Mersenne numbers, Fermat primes, twin primes, and factorials 梅森数、费马素数、孪生素数
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Prealgebra lesson 2
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4.27 Prealgebra exponent homework 指数作业讲解
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7.29 Palindromes and special numbers hw 回文数及特殊数作业
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7.20 Fractions, mixed numbers HW 分数作业讲解（带分数、假分数、分数运算、应用题等）
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6.22 Ch 3 Number theory homework 数论基础作业讲解
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7.24 Factoring by grouping, sum and difference of powers 分组因式分解、高次和差公式
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7.22 Factorials, perfect, abundant, deficient numbers, palindromes 阶乘、盈数亏数完全数、回文
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9.13 Circles Homework 圆的竞赛习题讲解
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8.7 多项式难题、多变量多项式因式分解 Polynomial Problems, Factoring Multivariable Polynomials
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3.22 丢番图方程，反函数 Rationalizing the denominator, SFFT, Diophantine equation, invers
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7.24 Polynomial synthetic division hw, the remainder theorem 多项式综合除法作业、余式定理
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9.16 等差数列、等比数列竞赛难题第二部分
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3.31 二次方程竞赛题讲解，单位圆
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6.20 Basic functions, trig identities, complex numbers, and polar coordinates
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10.10 代数数论习题 Part 2 Algebra with integers
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6.5 Remainder theorem, factor theorem Ch 6-7 homework 余式定理、因式定理、代数基本定理习题
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7.6 Ch 4 fractions, complex fractions, powers of fractions 分数乘除法、分数的幂，繁分数
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11.19 线性方程作业、画图解线性方程组
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PreCal 11 lesson 10 二次函数单元测试讲解
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数论第二课 因数个数、因数乘积
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10.1 代数数论习题 Algebra with integers
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8.31 Solving basic linear equations homework 解基本一元一次方程
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AMC 12 lesson 2 方程基础与三角恒等式
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7.3 The fundamental theorem of algebra, bounds, graphing, and applications
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10.21 斜率、斜截式、直线方程练习
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PreCal 12 lesson 19 圆锥曲线中圆的方程和习题
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5.26 Arithmentic and geometric sequences and series 等差等比数列
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4.26 Function transformations and inverse 函数图像变换，反函数
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PreCal 12 lesson 20 直线方程、圆的习题
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9.9 等差数列、等比数列竞赛难题，求和符号Sigma，求积符号Pi
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7.10 Parabola and circle hw. Ellipses and hyperbolas. 圆与抛物线作业习题、椭圆、双曲线
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4.12 Circles, composite and inverse functions 圆，复合函数，反函数
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PreCal 11 lesson 5 二次项系数不为1的配方、二次方程求根公式
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Prealgebra Lesson 31 一元一次方程竞赛题、小数运算
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7.21 Absolute value functions, graphing, and review of Precal 11 绝对值方程图像，数学11总复习
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PreCal 12 lesson 10 等差数列、求和符号
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AMC 10 Algebra special factorization lesson 1