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xxTIMURxx [149]
3 years ago
14

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

h term​

Mathematics
1 answer:
olga_2 [115]3 years ago
7 0

Answer:

The value for 20th term is 10.

Step-by-step 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)

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