. Find the sum of the following APs

Best Answer

Answer: Solution:(i) Here, a = 2, d = 5 and n = 10

Sum of n terms can be given as follows:

Thus, sum of the 10 terms of given AP (S_n)=245

(ii) Here, a = - 37, d = 4 and n = 12

Sum of n terms can be given as follows:

Thus, sum of the 12 terms of given AP (S_n)=  -180

(iii) Here, a = 0.6, d = 1.1 and n = 100

Sum of n terms can be given as follows:

(iv) Here,