How do I find the first term of an arithmetic sequence?
To answer this (or any other) question I need some data. It is impossible to solve such task without having anything given.
If I had two terms I could use the
The second term of an arithmetic sequence is 4. The fifth is 10. Find the first term.
In this task we have 2 terms given:
If we subtract the first equation from the second we can calculate
Now if we substitute the calculated value we see that:
Now we can answer that The first term of this sequence is 2