braat67 braat67

25-01-2021
Mathematics

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What is the 23th term of the sequence
{20, 16, 12.8, ... }

Respuesta :

asmaNasr asmaNasr

26-01-2021

Step-by-step explanation:

[tex]an = a1 + (n - 1)d \\ d = a2 - a1 \\ a1 = 20 \\ a2 = 16 \\ d = - 4 \\ an = 20 + (n - 1) \times - 4 \\ an = 20 - 4n + 4 \\ an = 24 - 4n \\ a23 = 24 - 4 \times 23 \\ a23 = - 68[/tex]

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