For each of the squences below, find a formula that generates the sequence.

(a) 10,20,10,20,10,20,

Step-by-step explanation:

First, we notice that the when n is odd, = 10. And when n is even, = 20.

The average of 10 and 20 is . So, the distance between 15 and 10 is the same that between 15 and 20.

That distance is 5.  

From 15, we need to subtract 5 to get 10 when n is odd and we need to add 5 to get 20 when n is even.

The easiest way to express that oscilation is using , because it is (-1) when n is odd and 1 when is even. And when multiplied by 5, it will add or subtract 5 as we wanted.

idkidkdidkdkdidkx

step-by-step explanation:

nndncnd cnn

snddnd

sas (side angle side)

aa (angle angle)

sss(side side side)

sas find two sides with an angle in between

aa is finding two angles and the third will add up to 180

sss find all sides

step-by-step explanation: