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the first term of an arithmetic sequence is equal to 200 and the common differencence is equal to -10. find the value of the 20th term​

User Nechama
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1 Answer

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Answer:

The value for 20th term is 10.

Explanation:

First, you have to find the formula for the sequence.


an = a + d(n - 1)


let \: a = 200,d = - 10


an = 200 - 10(n - 1)


an = 200 - 10n + 10


an = - 10n + 210

Given that the formula of this sequence is an = -10n + 210. Next, you have to find 20th term :


let \:n = 20


20th \: term = - 10(20) + 210


20th \: term = - 200 + 210


20th \: term = 10

(Correct me if I am wrong)

the first term of an arithmetic sequence is equal to 200 and the common differencence-example-1
User Anand G
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