Question

103. Five terms are in A.P. The product of Girst and last terms is 28, If the first term is 6 less than its third term.
Then lind A.P.
Hint: Let the numbers be a- 2d, a-d, a atd, a + 2d).​

Answer 1

• (a-2d)(a+2d)=28
• a square -4d=28 -1eq
• given a-2d=a-6
• by solving we get d as 3
• substitute in 1 eqby solving we get a =8
• then a-2d=2
• therefore ap:2,5,8,11,14