Thursday

August 21, 2014

August 21, 2014

Posted by **Anonymous** on Tuesday, September 13, 2011 at 10:44pm.

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?

- Math Formula Part 2/3 -
**Reiny**, Wednesday, September 14, 2011 at 8:45amNo, 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.

**Related Questions**

Math Formula--General Term - Consider the sequence 12, 5, -2, -9 Determine the ...

algebra - Could someone check my work; 1. Generate the first five terms in the ...

algebta 2 - To find the nth term of an arithmetic sequence the formula given is ...

Math binomial formula and sequence - a) use the binomial formula to find the 5th...

Sequences - Show full steps: 1a) Determine the formula for the nth term for 7,12...

math - 51.A sequence t is defined where the first term is –4. Each successive ...

math30 - A sequence has a first term of 24 and every other term is one half of ...

Sequence - Find the common difference and a formula formula for the nth term of ...

PreCal - Write a formula for the general term(the nth term)of the arithmetic ...

math - 1. Use the given arithmetic sequence to answer the following problems. ...