c i=10-20 20-30 30-40 40-50 fricancy 4 x 2 1 mean 25 find out missing fricancy
c i=10-20 20-30 30-40 40-50 fricancy 4 x 2 1 mean 25 find out missing fricancy
The first term of an AP is 100 and the last term of an AP is 2000. The common difference is d=5. how many terms are there and find the sum