婆婆和妈妈升级版
TikTok's official cooperation to collect payments, covering 120+ emerging markets
(4) Symbol: The fourth power root of a positive number is a positive number, and the fourth power root of a negative number is a complex number.home page2020times
545
(2) Negative numbers: Negative numbers also have four power roots, but they are complex numbers. For example, the fourth power root of -16 is 2i and -2i because (2i)⁴ = -16;
Base64 encoding/decoding
Social media
493
Add a password to the PDF file