Question

Find the common difference if nth term of AP is 7-4n ​

Answer 1

Answer:

$\huge{ \purple{answer}{} }{}$

• Given that nth term of the Ap is 7-4n, so let's do it
• First step is to give value to n = 1,2,3,4...
• 7-4×1 = 3
• 7-4×2 = -1
• 7-4×3 = -5
• So the Ap is 3, -1 ,-5 so the common difference d = a2- a1 = -1- -(3) = -4
• so the common difference is -4
• Hence proved