A) \[p,q,r,s,l,m\in I,q\ne 0,s\ne 0,m\ne 0.\]
B) \[a+b=b+a\]
C) \[a\times b=b\times a\]
D) none of these
Correct Answer: B
Solution :
\[\frac{a}{b}\times \frac{c}{d}=\frac{ac}{bd}\] \[ac,bd\in I,bd\ne 0\] Rationalizing factor\[\frac{a}{b}+\frac{c}{d}(c\ne 0)=\frac{\frac{a}{b}}{\frac{c}{d}}=\frac{ad}{bc}\]You need to login to perform this action.
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