TELL WHETER EACH SEQUENCE IS ARITHMETIC.JUSTIFY YOUR ANSWER.IF THE SEQUENCE IS ARITHMETIC,WRITE A FUNCTION RULE TO REPRESENT IT
1.6,0.8,0,-0,8....
5,10,20,40....
5,13,21,29....

Question

anonymous · Answer

a)  looks like we are subtracting ...
b)  looks like we are multiplying...
c)  looks like we are adding ...

anonymous · Answer

multiplication is not involved with arithmetic sequences

bimbim2697 · Answer

SO B IS NOT ARITHMETIC

anonymous · Answer

Stop yelling

bimbim2697 · Answer

sorry

anonymous · Answer

lol no problem. No, B is not arithmetic, it's geometric.

bimbim2697 · Answer

so a and c are 
how do i write a rule for those 
like -.8 would tht be a rule?

bimbim2697 · Answer

@hoblos is -.08 a function rule?

anonymous · Answer

$$a_{n} = a_{1} - 0.8(n-1)$$

bimbim2697 · Answer

wb c?

anonymous · Answer

Just replace the - 0.8 part in the last function with the common difference from C

bimbim2697 · Answer

Thanks much!