Answer:
hi iu C hi TC x tex t TC TC TC TC TC u TC u TC x itu TC
A (5,3)
B (-3,1)
C (-6,-4)
D (0, -3)
E (0,0)
F (4, -5)
G (6.5, 0)
Answer:
- T(n) = 3n² - 4
- -189 doesn't belong
Step-by-step explanation:
<u>Given sequence:</u>
<u>The first differences:</u>
<u>The second differences:</u>
<u>If the sequence is T(n) = an² + bn + c, we have:</u>
<u>Using the first and second differences work out the value of zero term:</u>
This gives us c = - 4
<u>Now we have:</u>
<u>The first term is T(1) = -1, substitute n = 1 and find the value of b:</u>
- 3(1²) + b*1 - 4 = - 1
- 3 + b - 4 = - 1
- b = 0
<u>The nth term is:</u>
<u>Now lets find if -189 belongs to this sequence:</u>
- - 189 = 3n² - 4
- 3n² = - 185
The left side is positive and the right side is negative so the answer is also negative
I'm just going to give you the formula so you can learn
(2 3/5 ·7) + (5 3/4 ·4)
