# I need help with my math homework. Please help, I need it. So what is the pattern in the following numbers?

I need the next two numbers in the pattern too. I also need to "explain my reasoning". 729, -243, 81, -27, 9

Update:

Thank you to every one, with a few exeptions. Like the people who implied that I was ignorant or something.

Relevance
• Alian
Lv 4

It's equal to: (-3)^6, (-3)^5, (-3)^4, (-3)^3, (-3)^2

Therefore, the next two are (-3)^1 and (-3)^0 which are -3 and 1

• 1 decade ago

You would divide each one be -3.

The next two numbers in the pattern would be -3 and then 1.

Source(s): my brain
• Anonymous

This is a geometric sequence

r=-1/3 (729/-243=-1/3, -243/81=-3, ...)

to find the nth term, use formula a_n=a_1* r^(n-1)

so...

the next two terms are the 6th and 7th respectively

so plug those numbers in,

you get:

a_6=729* (-1/3)^5=-3, and

a_7=729* (-1/3)^6=-1/3

of course, you can always rely on common sense

• 1 decade ago

divide by -3

the next two numbers are -3 and 1

• 1 decade ago

divided by -3

the next two numbers are -3 and 1

• 3 years ago

Divide one hundred fifty by skill of 8, then study something. === case in point, be conscious that 15 is interior the comparable row as 7 -- 15 / 8 = a million with the rest 7. be conscious that 11 is interior the comparable row as 3 -- 11/8 = a million the rest 3. be conscious that sixteen is interior the comparable row as 8 and 0. sixteen/8 = 2 the rest 0. Now persist with something rule to one hundred fifty/8.

• 1 decade ago

The pattern is divided by -3. So, next two nos. will be -3 and 1 respectively. Hope you get the idea now !!!!

• 1 decade ago

Divide each number by -3.

Source(s): 3 minutes of thinking
• 1 decade ago

they are the powers of negative three

so

-3^1=-3

-3^2= 9

-3^3=-27

-3^4= 81

.........

you should ge the idea now.