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Clearnote
Q&A
Senior High
Mathematics
x-1と1-xは同じですか?
Mathematics
Senior High
over 3 yearsago
びーにー
x-1と1-xは同じですか?
x-1と1-xは同じですか?
Answers
み
over 3 yearsago
違います^^
x-1と-1+x
1-xと-x+1
は同じです。
すなわち符号(+-)を変えずに順序だけ並べ替えたものは同じになります。
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