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Write a recursive formula for an, the nth term of the sequence 1, -2, -5,…

We need two things to write the recursive formula

is the first value of this sequence. For this set of values, , since appears first.

, the common difference, is . Basically it's just the the higher term minus the previous terms. To solve for ,

So regardless of what terms you choose, the common difference will be the same. Now the general formula for a recursive function is

where is the term. Let's substitute for and in this formula.

So the recursive formula is

where did you get them? if you picked from the grass, is is probably poisonous.

step-by-step explanation:

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.