Question

write an equation for the nth term of the arithmetic sequence. 7,3,-1,-5

Answer 1

Answer:

An =-4n+11

Step-by-step explanation:7,3,-1,-5

the common diference is : d = ( -5)-(-1)=(-1)-(3)=(3)-(-7)=- 4

the firt term is A1 = 7

the n-ieme term is : An = A1 +(n-1)d

An =7-4(n-1)

An =-4n+11 (  the nth term)