True, because "or" is a logical sum.
true = 1
false = 0,
sum (1+0) = 1, true.
In the first series, the summation applies to the whole (2n+3) inside
the parentheses, so the 3 gets summed up 5 times.
But in the second one, the summation only applies to the 2n , so
the 3 is only added after the summation is finished.
The difference between five 3s the first time and one 3 the second time
is your 12 .
I cannot understand what you are saying
The values for y are as follows
4.5, 4, 3.5, 3, 2.5, 2
