Any ideas on this one? Two hints, the next number in the sequence is 27, and it might be worthwhile asking what is the difference between the first and second term, then the second and third term (etc.) is.
Let us know how you go.
the diffrence between t1 and t2 is 4
and t2 and t3 is 5 ect, increaing in increments of 1
i understand that but for some rason i cant see to find the equationn for the nth term,
it was a question on my sisters test and i just cant get it
Right, so as n increases, we add more on. This is our first hint, that the n'th term will depend on n somehow.
Let's look at , you pointed out that it's 4 more than the first term, that is Now I want to work n into it somehow, since we noticed it depends on n. So maybe something like