1 files changed, 4 insertions, 0 deletions
diff --git a/progs/a854.py b/progs/a854.py
new file mode 100644
index 0000000..6c39844
--- /dev/null
+++ b/progs/a854.py
@@ -0,0 +1,4 @@
+import math
+def sum_gp(a,n,r):
+ total = (a * (1 - math.pow(r, n ))) / (1- r)
+ return total
+\ No newline at end of file