The common difference of the given sequence is -4.
A set of numbers is an arithmetic progression (AP) or an arithmetic sequence such that the difference between successive words is unchanged.
Given sequence is: 7,3,-1,-5
a1=7, a2= 3
Common difference,
d= a2-a1
d= 3-7
d=-4
again
d= a3-a2
d= -1-3
d=-4
Hence, the common difference is -4.
Learn more about arithmetic progression here:
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