Question

What is the common difference of the A.P. 5,1,-3,-7

Answer 1

Answer:-4

Step-by-step explanation:1-5=-4

-3-1=-4

So it is an ap with common difference -4

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Answer 2

a=t1=5, t2=1,t3=-3,t4=-7

t2-t1=1-5=-4

t3-t2=-3-1=-4

difference between two congestive terms is -4.

therefore d = -4