Answer:
54
Step-by-step explanation:
Tn = an²+bn
T2 = a2²+2b
2 = 4a +2b
Multiply all through by 2
4 = 8a +4b
4b = 4-8a
T4 = a4² + 4b
20 = 16a +4b
4b = 20-16a
4-8a = 20-16a
16a -8a = 20-4
8a = 16
a = 16/8 = 2
4b = 4-8a = 4-8(2) = 4-16 = -12
b = -12/4 = -3
T6 = a6² + 6b
T6 = 2(36) + 6(-3) = 72 -18 = 54
The answer you're looking for is s=6.
by substitution you'd get 6.
This shape would be a rectangular prism, with 4 rectangular sides, and 2 square or smaller rectangular sides.
An example of a rectangular prism would be a brick. It has 4 sides that are perfectly alike, then two other sides that are like each other.
9/10=a/30. and value of a is 27
