The sum of the first n natural numbers and 0=
n*(n+1)/2
Answer: option c.
Step-by-step explanation:
Option a, b and d are linear equations because they are in the form of y = mx + c which is a straight line.
x ≤ 6
which is A
or if not then it's B for
x ≥ 6
Answer: 23/18
Step-by-step explanation:
Answer:
Step-by-step explanation:
I don’t know why they bother teaching recursive formulas as the explicit is almost always used :)
For 2,9,16,23...
Recursive is a(n+1)=an+7
Explicit is an=2+7(n-1)
(or more neatly an=7n-5)
For 2,14,98,686...
Recursive is a(n+1)=7an
Explicit is an=2(7^(n-1))
(or (2/7)7^n )
