Question

In an A.P of first term is 2, the sumnof the first 5 term is one fourth of the sum of next 5 terms find the sumbof first 20 terms

Answer 1

Answer:

Step-by-step explanation

a =2

S5=1÷4 (s10)

S20=?

S5=1÷4 (s10)

From solving this we will get d =4

S20=[2 (2)+(20-1)(4)]

S20= 740