Question

2
12
22
n?
+...+
+
1.3 3.5
(2n-1)(2n +1)
1)
n(n+1)
2n +1
2)
n(n+1)
2(2n +1)
n
n+1
4)
3)
(
2(2n +1)
2n +1​

Answer 1

Answer:

write the question properly. nothing is understandable

Answer 2

Answer:

Xmas FM Hf km c

Step-by-step explanation:

thx hmm cb