汉英词典
Chinese-English Dictionary
MEANING OF 恆等式
恆等式 (恒等式)
identity (math.)
〈名〉所含的未知量用任意数代替,等号两边的数值永远相等的式子。如cos2x+sin2x=1,(ɑ+b)²=ɑ²+2ɑb+b²。
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