Question

प्रश्न 1.(a) प्रदर्शित कीजिए कि समुच्चय {1, -1, i, -i} जबकि i= 2.
सम्मिश्र संख्याओं के गुणन के लिए एक सीमित आबेली ग्रुप है।​

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Answer......Thomas Alva Edison was widely known as America's most prolific inventor, even after his death in 1931. He held a total of 1,093 U.S. patents (1,084 utility patents and 9 design patents). In 2003, his patent count was exceeded by Japanese inventor Shunpei Yamazaki.