Question
Thu August 02, 2012 By:
 

in an ap,the first term is 2.if the sum of the first 5 terms is one-fourth the sum of next 5 terms show that the 20th term is -112

Expert Reply
Thu August 02, 2012

Therefore, 20th term = a20 = a + (n - 1)d

                                = 2 + (19)(-6) = 2 - 114 = -112

Home Work Help