Pre-Calculus 30s Flashcards

1

what is √x defined as?

x∈R
x>0 or x=0
x≠0
x<0 or x=0

2

how many roots does this photo have?

one root
no roots
two roots
three roots

3

when multiplying or dividing rational expressions LCD is needed

True
False

4

What is the first step to graphing this parabola?: 2x²+8x-1

state the domain and range
Complete the Square
Find the Reciprocal
Graph invariant points

5

when is sine law used?

when there are no "pairings"
when there's an ambiguous case
whenever cosine law isnt
when the given angle is opposite the smallest side

6

what formula is used to solve this geometric sequence?: 3, 6, 9, 12 . . . t₇

tn = t1 r n - 1
Sn = n ( t1 + tn) / 2
Sn = t1 (1 - r n ) / 1 - r
tn = t1 + d (n - 1)

7

what are characteristics of θr

less than or equal to 180 degrees
mesured from initial arm to nearest x-axis
less than or equal to 90 degrees
measured from terminal arm to nearest x-axis

8

∛x or ∜x are defined as x∈R

False
True

9

geometric sequences and series use common differences

False
True

10

when is there an ambiguous case triangle?

when there are no given angles
when there are no sides
when the given angle is opposite the largest side
when given angle is opposite the smallest side

11

Completing the square changes vertex form to general form

True
False

12

how many roots does this equation have?: 4²- 4(5)(-1) = 36

one rational root
two rational roots
no roots
two irrational roots

13

cosine law is used whn there are no pairings

False
True

14

when is a parabola wider?

a > 1
idk lol
a = 1
a < 1

15

how many verticle asymptotes are in this photo?

one
three
none
two

Pre-Calculus 30s

Questions 15

Pre-Calculus 30s

Questions 15