Question

without actual addition find the sum of the following
a-1+3+5+7+9+11+13
b-1+3+5+7+9+11+13+15+17
c-1+3+5+7
d-1+3+5+7+9+11​

Answer 1

Step-by-step explanation:

hey mate

here

1+3+5+7+9+11+13= (7)^2= 49

1+3+5+7+9+11+13+15+17= (9)^2= 81

1+3+5+7= (4)^2= 16

1+3+5+7+9+11= (6)^2= 36

hope it helps ✌