By clearly looking at the sequence there are in Arithmetic Progression So for finding which term is 2218 in that sequence we have x_{n} = a+ (n-1)d Here, a=3 x_{n}=2218 & d=5(by looking at the sequence given) by substituting those values we get our desired result 2218=3+(n-1)5 2218-3=(n-1)5 2215=(n-1)5 2215/5=n-1 453=n-1 n=454 so 454 term is 2218
