Answer: 3520
Step-by-step explanation:
First: Find the a1 or 1st term in 550, 440, 352.
a1= 550, a2= 440, a3=352
So, the 1st term or a1 is 550
Second: Find the common difference.
Solution:
d= a2-a1
d= 440-550
d= -110
Therefore, the common difference is -110
Third(last step): find the 9th term or a9 using the equation an=a1+(n-1)d or an=a1+d(n-1)
Final Solution: a1=550, d= -110, n=9
an=a1+d(n-1)
a9= 550+(-110)(9-1)
a9= 550-110(8)
a9= 440(8)
a9= 3520
Therefore, the 9th term or a9 of 550, 440, and 352 is 3520
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Answers & Comments
Answer: 3520
Step-by-step explanation:
First: Find the a1 or 1st term in 550, 440, 352.
a1= 550, a2= 440, a3=352
So, the 1st term or a1 is 550
Second: Find the common difference.
Solution:
d= a2-a1
d= 440-550
d= -110
Therefore, the common difference is -110
Third(last step): find the 9th term or a9 using the equation an=a1+(n-1)d or an=a1+d(n-1)
Final Solution: a1=550, d= -110, n=9
an=a1+d(n-1)
a9= 550+(-110)(9-1)
a9= 550-110(8)
a9= 440(8)
a9= 3520
Therefore, the 9th term or a9 of 550, 440, and 352 is 3520