Unit 1 Flashcards

1
Q

Distance formula

A

d= √(x2-x1)²+(y2-y1)²

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Midpoint formula

A

(x1+x2/2),(y1+y2/2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Gradient formulas

A

m=y2-y1/x2-x1

m=tanø

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When are points collinear

A

When they lie on the same straight line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Gradients of perpendicular lines

A

m x m_ = -1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How to find a median

A

Midpoint
Gradient
Equation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How to find an Altitude

A

Gradient
Perpendicular gradient
Equation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How to find a perpendicular bisector

A

Midpoint
Gradient
Perpendicular gradient
Equation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

When are lines concurrent

A

If there is a point through which they all pass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is this

f^-1(x)

A

Inverse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How to find the inverse of a function

A

Change notation from f(x) to y
Change subject to x
Change notation back to f^-1(x)
Change y in equation to x

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How to draw the graph of an inverse

A

Reflect it over the line y=x

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is this

f(x)=a^x

A

Exponential function

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What points do the graphs of an exponential function always pass through

A

(0,1) (1,a)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How to sketch the graph of an exponential function

A

Sub in x=0

Sub in x=1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is this

f(x)=log a x

17
Q

What points to the graph of a logarithmic function always pass through

A

(1,0) (a,1)

18
Q

How to change degrees to radians and radians to degrees

A

x 3.14 x 180

180 3.14

19
Q

Exact values table

A

30 45 60

sinx 1/2 1/√2 √3/√2

cosx √3/2 1/√2 1/2

tanx 1/√3 1 √3/1

20
Q

f(x)+a

A

Shifts graph up y axis

21
Q

f(x+a)

A

Shifts graph -a along x axis

22
Q

-f(x)

A

Reflects graph in x axis

23
Q

f(-x)

A

Reflects graph in y axis

24
Q

kf(x)

A

Scales graph vertically
Stretches if k>1
Compresses if k<1

25
f(kx)
Scales graph horizontally compresses if k>1 stretches if k<1
26
How to differentiate
Multiply first term by power | Minus 1 from power
27
3 types of notation when differentiating
f’(x) dy/dx d/dx (term)
28
How to find the rate of change/velocity of a function
Differentiate | Sub in x coordinate
29
What is a tangent
A straight line that touches a curve
30
How to find the equation of a tangent
Find coordinates of point Differentiate curve equation Sub in x coordinate to get gradient Write out equation
31
When is a curve strictly increasing
derivative > 0
32
When is a curve strictly decreasing
Derivative < 0
33
How to find if a curve is strictly increasing/decreasing
Differentiate equation of curve Sub in x coordinate Look if dy/dx is < or >0
34
How to find stationary points and determine their nature
Differentiate equation of curve Make derivative equal to zero Factories for x coordinates Sub each x coordinate into original equation of curve for y coordinates Draw nature table using x coordinates and derivative to determine nature
35
How to sketch a curve
``` Find where cuts y axis when x=0 Find where cuts x axis when y=0 Find stationary points Do nature table Draw graph ```
36
How to find the closed interval of a graph
Find stationary points Do nature table State interval ends by subbing values into original equation Find where cuts the x and y axis by subbing in zero Draw graph
37
How to draw the graph of a derivative
Switch line directions when drawing
38
What do A and B represent? | Un+1 = AUn + B
A is percent increase/decrease added/subtracted from 100, divided by 100 B is variable being introduced
39
Limit of a sequence formula
l = b/1-a