diff --git a/C03-Growth-of-Functions/problem.md b/C03-Growth-of-Functions/problem.md
index 51fac4c1..387ac816 100644
--- a/C03-Growth-of-Functions/problem.md
+++ b/C03-Growth-of-Functions/problem.md
@@ -18,7 +18,7 @@ A | B | O | o | Ω | ω | Θ
 ![](http://latex.codecogs.com/gif.latex?\\n^k) | ![](http://latex.codecogs.com/gif.latex?c^n) | yes | yes | no | no | no
 ![](http://latex.codecogs.com/gif.latex?\\sqrt{n}) | ![](http://latex.codecogs.com/gif.latex?n^\\sin{n}) | no | no | no | no | no
 ![](http://latex.codecogs.com/gif.latex?\\2^n) | ![](http://latex.codecogs.com/gif.latex?2^{n/2}) | no | no | yes | yes | no
-![](http://latex.codecogs.com/gif.latex?n^\\lg{c}) | ![](http://latex.codecogs.com/gif.latex?c^\\lg{n}) | yes | no | yes | no | yes
+![](http://latex.codecogs.com/gif.latex?\\n^{lg{c}}) | ![](http://latex.codecogs.com/gif.latex?\\c^{lg{n}}) | yes | no | yes | no | yes
 ![](http://latex.codecogs.com/gif.latex?\\lg{\(n!\)}) | ![](http://latex.codecogs.com/gif.latex?\\lg{\(n^n\)}) | yes | no | yes | no | yes
 
 For this problem, some people point out that
@@ -36,25 +36,34 @@ YES YES YES YES YES
 
 [issue 103](https://github.com/gzc/CLRS/issues/103)
 
-
+
 ### Problems 3 : Ordering by asymptotic growth rates
-***
-a.
-Rank the following functions by order of growth; that is, find an arrangement ![](https://latex.codecogs.com/gif.latex?g_1,&space;g_2,...,g_{30}) of the functions satisfying ![](https://latex.codecogs.com/png.latex?g_1=\Omega\(g_2\),g_2=\Omega\(g_3\),...,g_{29}=\Omega\(g_{30}\)). Partition your list into equivalence classes such that functions ![](https://latex.codecogs.com/png.latex?f\(n\)) and ![](https://latex.codecogs.com/png.latex?g_i\(n\)) are in the same class if and only if ![](https://latex.codecogs.com/png.latex?f\(n\)=\Theta\(g\(n\)\)).
-![](https://latex.codecogs.com/png.latex?lg\(lg^*n\)\quad&space;2^{lg^*n}\quad&space;\(\sqrt{2}\)^{lgn}\quad&space;n^2&space;\quad&space;n!\quad&space;\(lgn\)!\newline&space;\(\frac{2}{3}\)^n\quad&space;n^3\quad&space;lg^2n\quad&space;lg\(n!\)\quad&space;2^2^n\quad&space;n^{1/lgn}\newline&space;ln&space;lnn\quad&space;lg^*n\quad&space;n\cdot&space;2^n\quad&space;n^{lg&space;lgn}\quad&space;lnn\quad&space;1\newline&space;2^{lgn}\quad&space;{\(lgn\)}^{lgn}\quad&space;e^n\quad&space;4^{lgn}\quad&space;\(n+1\)!\quad&space;\sqrt{lgn}\newline&space;lg^*\(lgn\)\quad&space;2^{\sqrt{2lgn}}\quad&space;n\quad&space;2^n\quad&space;nlgn\quad&space;2^{2^{n+1}})
-
-b.
+***
+a.
+Rank the following functions by order of growth; that is, find an arrangement ![](https://latex.codecogs.com/gif.latex?g_1,&space;g_2,...,g_{30}) of the functions satisfying ![](https://latex.codecogs.com/png.latex?g_1=\Omega\(g_2\),g_2=\Omega\(g_3\),...,g_{29}=\Omega\(g_{30}\)). Partition your list into equivalence classes such that functions ![](https://latex.codecogs.com/png.latex?f\(n\)) and ![](https://latex.codecogs.com/png.latex?g_i\(n\)) are in the same class if and only if ![](https://latex.codecogs.com/png.latex?f\(n\)=\Theta\(g\(n\)\)).
+![](https://latex.codecogs.com/png.latex?lg\(lg^*n\)\quad&space;2^{lg^*n}\quad&space;\(\sqrt{2}\)^{lgn}\quad&space;n^2&space;\quad&space;n!\quad&space;\(lgn\)!\newline&space;\(\frac{2}{3}\)^n\quad&space;n^3\quad&space;lg^2n\quad&space;lg\(n!\)\quad&space;2^2^n\quad&space;n^{1/lgn}\newline&space;ln&space;lnn\quad&space;lg^*n\quad&space;n\cdot&space;2^n\quad&space;n^{lg&space;lgn}\quad&space;lnn\quad&space;1\newline&space;2^{lgn}\quad&space;{\(lgn\)}^{lgn}\quad&space;e^n\quad&space;4^{lgn}\quad&space;\(n+1\)!\quad&space;\sqrt{lgn}\newline&space;lg^*\(lgn\)\quad&space;2^{\sqrt{2lgn}}\quad&space;n\quad&space;2^n\quad&space;nlgn\quad&space;2^{2^{n+1}})
+
+b.
 Give an example of a single nonnegative function ![](https://latex.codecogs.com/png.latex?f\(n\)) such that for all functions ![](https://latex.codecogs.com/png.latex?g_i\(n\)) in part (a), ![](https://latex.codecogs.com/png.latex?f\(n\)) is neither ![](https://latex.codecogs.com/gif.latex?\O\(g_i\(n\)\)) nor  ![](https://latex.codecogs.com/gif.latex?\Omega\(g_i\(n\)\)).
 
 ### `Answer`
-a.
-![](https://latex.codecogs.com/gif.latex?2^{2^{n+1}}\quad&space;2^{2^{n}}\newline&space;\(n+1\)!\quad&space;n!\newline&space;e^n\quad&space;n\cdot&space;2^n\quad&space;2^n\quad&space;\(\frac{3}{2}\)^n\newline&space;\(lgn\)^{lgn}=n^{lglgn}\quad&space;\(lgn\)!\newline&space;n^3\quad&space;n^2=4^{lgn}\quad&space;nlgn=lg\(n!\)\quad&space;2^{lgn}=n\quad&space;\(\sqrt{2}\)^{lgn}=\sqrt{n}\quad&space;2^{\sqrt{2\cdot&space;lgn}}\newline&space;lg^{2}n\quad&space;lnn\quad&space;\sqrt{lgn}\newline&space;lnlnn\quad&space;2^{lg^{*}n}\newline&space;lg^{*}n\quad&space;lg^{*}\(lgn\)\quad&space;lg\(lg^{*}\)n\newline&space;n^{\frac{1}{lgn}}=2\quad&space;1)
-![](https://latex.codecogs.com/gif.latex?\(lgn\)^{lgn}=n^{lglgn}\quad&space;because&space;of\quad&space;a^{log_bc}=c^{log_ba}\newline&space;n^{\frac{1}{lgn}}=2\quad&space;because\quad&space;n^{\frac{1}{lgn}}=2^{lgn\cdot&space;\frac{1}{lgn}}=2)
-
-b.
-![](https://latex.codecogs.com/png.latex?2^{2^\sin{n}})
-
-
+a.
+![](https://latex.codecogs.com/gif.latex?2^{2^{n+1}}\quad&space;2^{2^{n}}\newline&space;\(n+1\)!\quad&space;n!\newline&space;e^n\quad&space;n\cdot&space;2^n\quad&space;2^n\quad&space;\(\frac{3}{2}\)^n\newline&space;\(lgn\)^{lgn}=n^{lglgn}\quad&space;\(lgn\)!\newline&space;n^3\quad&space;n^2=4^{lgn}\quad&space;nlgn=lg\(n!\)\quad&space;2^{lgn}=n\quad&space;\(\sqrt{2}\)^{lgn}=\sqrt{n}\quad&space;2^{\sqrt{2\cdot&space;lgn}}\newline&space;lg^{2}n\quad&space;lnn\quad&space;\sqrt{lgn}\newline&space;lnlnn\quad&space;2^{lg^{*}n}\newline&space;lg^{*}n\quad&space;lg^{*}\(lgn\)\quad&space;lg\(lg^{*}\)n\newline&space;n^{\frac{1}{lgn}}=2\quad&space;1)
+![](https://latex.codecogs.com/gif.latex?\(lgn\)^{lgn}=n^{lglgn}\quad&space;because&space;of\quad&space;a^{log_bc}=c^{log_ba}\newline&space;n^{\frac{1}{lgn}}=2\quad&space;because\quad&space;n^{\frac{1}{lgn}}=2^{lgn\cdot&space;\frac{1}{lgn}}=2)
+
+b.
+![](https://latex.codecogs.com/png.latex?2^{2^\sin{n}})
+
+### Problems 6 : Iterated functions
+f(n) | c | fc*(n) 
+:----:|:----:|:----:|
+n-1 | 0|  \|n\||
+log n| 1| log* n
+n/2|1| ![](https://latex.codecogs.com/gif.latex?\\left&space;\lceil&space;log&space;n&space;\right&space;\rceil)
+n/2 |2|![](https://latex.codecogs.com/gif.latex?\left&space;\lceil&space;log&space;n&space;\right&space;\rceil&space;-1)
+![](https://latex.codecogs.com/gif.latex?\sqrt{n}) | 2 | loglog n
+![](https://latex.codecogs.com/gif.latex?\sqrt{n}) | 1 | undefined
+![](https://latex.codecogs.com/gif.latex?n^{\frac{1}{3}}) | 2 | ![](https://latex.codecogs.com/gif.latex?log{_3}log{_2}(n))
+n/log n | 2 | ![](https://latex.codecogs.com/gif.latex?\frac{log&space;n}{log(log&space;n)})
 ***
-Follow [@louis1992](https://github.com/gzc) on github to help finish this task.
-
+Follow [@louis1992](https://github.com/gzc) on github to help finish this task.
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