Mathematics

What does this symbol ( ∪ ) represent in set theory?

• Union

• Intersection

• Disjointed

• Subset

What is {2,4,6,8,10} in set builder notation?

What are the dimensions of this matrix?

• 2 x 3
• 3 x 2
• 6 x 1
• 1 x 6

• 8

• -24

• 24

• -22

Which one is the same as fοg(x)

• g(f(x))

• f(g(x))

Given f(x) = 3x + 10
and g(x) = x - 2
Find f(g(5))

• 19

• 23

• -10

• None of these.

Given that f(x) = x² + x and g(x) = 3x + 1, find the value of g(f(-2)).

• -14

• 20

• 6

• 7

Multiply

• 20     15    -10
  30     -5         0
• -20      15     -10
  30     -5          0
• 1        8       3
  11     4        5
• 20     -15     10
  -30         5        0  

Given:

f(x) = 2x

g(x) = x² + 3

Find f(g(3))

• 24

• 72

• 18

• 3