The first term of an arithmetic sequence is 2. The sum of the third and the sixth terms is 25. What is the fourth term?

Guest Aug 20, 2020

#1**0 **

3rd + 6th term = 25 let x = third term

x + 3d = 25

AND x - 2d= 2 x = 2 + 2d

sub into the first equation

2 + 2d + 3d = 25

5d = 23

d = 23/5

1st + 3d = 4th term

2 + 3 (23/5) = ........

ElectricPavlov Aug 20, 2020