arithmetic progression

noun

🔊/ˌærɪθmetɪk prəˈɡreʃn/

(also arithmetic series

🔊/ˌærɪθmetɪk ˈsɪəriːz/

🔊/ˌærɪθmetɪk ˈsɪriːz/

)

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a series of numbers that decrease or increase by the same amount each time, for example 2, 4, 6, 8算术数列，等差数列（如 2、4、6、8） compare geometric progression