Question

Struggling to simplify this expression.....

Answer 1

Can you show me the expression? :)

Answer 2

\[\frac{ 1 }{ \sum_{i}^{n} X_i -n \frac{ \sum_{i}^{n}X_i^2 }{ \sum_{i}^{n} X_i }} +\frac{ X_i }{ \sum_{i}^{n} X_i^2 -\frac{ 1 }{ n }(\sum_{i}^{n}X_i)^2}\]

Answer 3

@BlossomCake

Answer 4

Oh, my. O_O

Answer 5

I, uh, really wish I could help but I am in eighth grade and have not yet learned this... Again, very sorry!

Answer 6

@iGreen @zepdrix @amistre64 any thoughts?

Answer 7

@tkhunny @sammixboo

Answer 8

@campbell_st @StudyGurl14 @Preetha @Data_LG2 @bohotness can you help?

Answer 9

@Data_LG2 Shall I upload my working to show how I got to this stage?

Answer 10

I haven't learned it yet. sorry.
but i think it will help the helpers if you post that too.

Answer 11

@Data_LG2 Do you know anybody who might be able to help?

Answer 12

hmm.. you already tagged the people I know who can help you :/

Answer 13

@Data_LG2 Hopefully someone might show up soon!

Answer 14

o.O

No idea

Answer 15

notifications are disappearing, so I suggest that post the link of your question to the chat boxes or pm the person who you think that can help you.

Answer 16

oy that IS a nightmare of algebra isnt it

Answer 17

\[\frac{ 1 }{ \sum_{i}^{n} X_i -n \frac{ \sum_{i}^{n}(X_i)^2 }{ \sum_{i}^{n} X_i }} +\frac{ X_i }{ \sum_{i}^{n} (X_i)^2 -\frac{ 1 }{ n }(\sum_{i}^{n}X_i)^2}\]


\[\frac{ { \sum_{i}^{n} X_i } }
{ \sum_{i}^{n} X_i~{ \sum_{i}^{n} X_i } -n { \sum_{i}^{n}(X_i)^2 }}

+\frac{n X_i }
{ n\sum_{i}^{n} (X_i)^2 -(\sum_{i}^{n}X_i)^2}\]


\[\frac{ { \sum_{i}^{n} X_i } }
{ (\sum_{i}^{n} X_i)^2-n { \sum_{i}^{n}(X_i)^2 }}

+\frac{n X_i }
{ n\sum_{i}^{n} (X_i)^2 -(\sum_{i}^{n}X_i)^2}\]


\[\frac{ { \sum_{i}^{n} X_i }-n X_i }
{ (\sum_{i}^{n} X_i)^2-n { \sum_{i}^{n}(X_i)^2 }} \]

Answer 18

when do we consider it simplified enough?