For this case we have the following expressions:
and 
Let:
(Integer m)
(Integer n)
By definition, an integer m is divisible by an integer n if the remainder of the division is 0. That is, there is an integer p such that: 
Rewriting the expression we have:

So:

We cancel similar terms:

We check:

Answer:
If they are divisible

Answer: The sequence 3, 12, 26, ... is not a geometric sequence.
Step-by-step explanation:
one could be that all the angles add up to 180
180-71= 109
∠DBC and ∠ABC must add up to 109 degrees
Answer:
13×1/4
Step-by-step explanation:
turn into improper fraction