Question

Two ap's have the same common difference. the first term is -1 and the second term is -8 then the common difference between their 4th term is? ​

Answer 1

Step-by-step explanation:

Given Two ap's have the same common difference. the first term is -1 and the second term is -8 then the common difference between their 4th term is?  

• Given two AP’s have the same common difference and first term is – 1 and second term is – 8. So we can write as  
• A.P 1 = - 1 , - 1 + d  
• A.P 2 = - 8 , - 8 + d
• Also a4 = a + 3d
• Now difference between the 4th term is
• = - 8 + 3d – (- 1 + 3d)
• = - 8 + 3d + 1 – 3d
• = - 7    

Reference link will be

https://brainly.in/question/1087828