add note on ex. 1.11.

1 files changed, 5 insertions, 0 deletions

diff --git a/sicp.org b/sicp.org
index 4611cb2..9c9cfed 100644
--- a/sicp.org
+++ b/sicp.org
@@ -277,3 +277,8 @@ is ~A = 2x2^y~.
 =(h n)= computes  =(expt 2 (h (1- n)))=
 ***** (define (k n) (* 5 n n))
 =(k n)= computes  =(* 5 n n)=
+*** 11
+I could not come up with a an iterative procedure.
+
+two versions of the recursive procedure are available at
+one/eleven.scm.