Question

what is the rule for 1,4,9,16

Answer 1

are you looking for the explicit or recursive answer?

Answer 2

These numbers are jusr perfect square starting with 1.

That is, 1^2 = 1
2^2 = 4
3^2 = 9, etc.

So the rule is x^2, x is an integer and starting with 1.

Answer 3

sorry i just wanted to say this is my most favorite rule EVER!

Answer 4

wouldnt it really be n^2

Answer 5

You can call it n^2, y^2, x^2, (anythi letter)^2...lol

Answer 6

ok

Answer 7

well the "correct" letter is n because when you display the sequence in summation notation the correct "equation" uses the variable n. ex: \[\sum_{n=1}^{4}n^2\]

Answer 8

correct me if im wrong:)

Answer 9

n is often used, but many texts use i, etc...

Answer 10

ok my bad

Answer 11

no i think n is the proper variable

Answer 12

Then use n.

Answer 13

and just for your information @Hiiiiiiiiiiiii n^2 would be an explicit equation