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anonymous
 one year ago
What is the 9th term of the geometric sequence 4, 20, 100, …?
312,500
12,500
62,500
1,562,500
anonymous
 one year ago
What is the 9th term of the geometric sequence 4, 20, 100, …? 312,500 12,500 62,500 1,562,500

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alekos
 one year ago
Best ResponseYou've already chosen the best response.1\[a _{n}=a _{1}r ^{n1}\]

alekos
 one year ago
Best ResponseYou've already chosen the best response.1where n=9, a1=4 and I'll let you work out the common ratio r

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How do you find the common ratio?

alekos
 one year ago
Best ResponseYou've already chosen the best response.1just divide the second term by the first term or 3rd by the 2nd

alekos
 one year ago
Best ResponseYou've already chosen the best response.1thats the common ratio between terms

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Is the common ratio a 5?

alekos
 one year ago
Best ResponseYou've already chosen the best response.1now just plug the values into the equation
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