I've done the second part to the Math Formula post. It was determine the 19th term of the sequence which I did.
Now it says..which of the numbers -268 and -350 are terms of the sequence?
I was doing something like this:
tn = -7 (-268) +19
I was plugging -268 as n. But that just confused me. How do I figure this out?
No, you are trying to find n.
Phrased another way:
Which term in the sequence is equal to -268
let that term number be n
remember tn = a + (n-1)d
from your previous post
a =
d =
-268 = 12 + (n-1)(-7)
-280 = -7n + 7
-287 = -7n
n = 41
so the t41 = -268
Do the same thing for tn = 350
remember , that n has to be a positive whole number, or else there is not such term.
I was born in 2010
To determine whether -268 and -350 are terms of the sequence, you can plug these values into the formula and check if they satisfy the equation.
The given formula to find the nth term of the sequence is:
tn = -7n + 19
To check if a number is a term of the sequence, substitute the value of the number into the formula and see if the equation holds true.
For -268:
Plug n = -268 into the formula:
t(-268) = -7(-268) + 19
t(-268) = 1876 + 19
t(-268) = 1895
Since the value of t(-268) is 1895, -268 is a term of the sequence.
For -350:
Plug n = -350 into the formula:
t(-350) = -7(-350) + 19
t(-350) = 2450 + 19
t(-350) = 2469
Since the value of t(-350) is 2469, -350 is a term of the sequence.
Therefore, both -268 and -350 are terms of the sequence.