A problem by OJAS JAIN

Level pending

If a=b−c,b=c−d,c=d−aa=b-c, b=c-d, c=d-a and abcd≠0abcd \neq 0, find the value of

ab+bc+cd+da. \frac{a}{b}+\frac{b}{c}+\frac{c}{d}+\frac{d}{a}.

Ojas Jain by OJAS JAIN
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