?
$${\text{If }}\frac{{3a + 4b}}{{3c + 4d}}{\text{ = }}\frac{{3a - 4b}}{{3c - 4d}}{\text{ then}}$$
Answer & Solution
Correct Answer:
Option
B
$$\eqalign{
& {\text{According to question,}} \cr
& \frac{{3a + 4b}}{{3a - 4b}}{\text{ = }}\frac{{3c + 4d}}{{3c - 4d}} \cr
& \Rightarrow \frac{{3a}}{{4b}} = \frac{{3c}}{{4d}} \cr
& \Rightarrow ad = bc \cr} $$
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