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既然 x+2=3 的解是 x=1,那为啥两边求导的结果不同?

intermediate知乎1 min read
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Key Vocabulary

deHSK1

(bound form) bull's-eye; target

shìHSK1

to be (followed by substantives only)

求导qiú dǎo
两边liǎng biān
正确zhèng quèHSK4

correct; sound; right; proper

公式gōng shìHSK7

formula

热度rè dùHSK6

(coll.) a temperature (i.e. abnormally high body heat)

代入dài rù
chūHSK2

(used after a verb to indicate an outward direction or a positive result)

我们wǒ menHSK1

we; us; ourselves; our

等式děng shì
如果rú guǒHSK3

in the event that

duìHSK1

to check; to compare

zhǐHSK1

classifier for birds and certain animals, one of a pair, some utensils, vessels etc

既然jì ránHSK4

since; as; this being the case

想解xiǎng jiě
wànHSK2

ten thousand

jiùHSK2

(of food) to go with

néngHSK1

surname Neng

方程fāng chéng
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