Question

Find the common difference of an AP whose An: -3n+7

Answer 1

Step-by-step explanation:

Substitute n=1...then you will find a1..

Use the same method to find a2..

After finding a1 and a2...

Subtract a1 from a2 to get the COMMON DIFFERENCE..

Hope this helps...

Bhuvan..

Answer 2

Answer:

-3

Step-by-step explanation:

an=a +(n-1)d

-3n+7=a + nd-d

(-3n) + (7) = (a-d) +(nd)

comparing the appropriate coefficients

-3n=nd

d = -3