Question 1140444
There will be 50 terms of 2 (sum is 100)
the other 50 terms are an arithmetic series of 5+9+13+17..., and there are 50 of them with a difference between each of 4.
The sum is S50=(n/2)(a1+an), n=50
an=a1+d(n-1)=5+4(49)=201
so the sum S50=25(5+201)=25(506)=12650
so the total sum is 12,750