Algebra ['ældʒɪbrə] 代数 Flashcards

1
Q

term

A

方程里面的项

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2
Q

like term

A

同类项

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3
Q

coefficient

A

系数 2是 2x的系数

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4
Q

equation

A

方程式;等式

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5
Q

quadratic equation

A

二次项方程式

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6
Q

function

A

方程

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7
Q

principal

A

本金

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8
Q

simple interest

A

单利 只按本金计算利息

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9
Q

compound interest

A

复利 将所生的本金再加入 利滚利

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10
Q

xy-plane

A

平面直角坐标系

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11
Q

如何求两点的距离

A

就是对应的x,y,z坐标做差,然后对每个差平方,然后把每个平方值做和,最后将这个和开根号即可,是2次根号

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12
Q

slope

A

斜率 y=mx+b m就是斜率

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13
Q

reciprocal

A

互为倒数

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14
Q

如何求两点组成的直线的斜率?

A

y1–y2/ x1–x2

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15
Q

两条直线斜率如何垂直?

A

相乘等于负1 比如 y=2x 和 y= -1/2 x

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16
Q

如何求一条直线的方程

A

知道两点 先求 斜率 然后再带入一个点

17
Q

symmetry

A

对称的那条线

18
Q

parabola

A

抛物线

19
Q

vertex

A

定点

20
Q

图形移动的规律是什么

A

左加又减f(x+4) 上加下减 f(x)+4

21
Q

stretched vertically ; shrunk vertically

A

想起来是什么就好