Question

some plz solve this ......its urgent

Answer 1

HEY Buddy.....!! here is ur answer

$Given \: that \: : \frac{3a + 4b}{3c + 4d} = \frac{3a - 4b}{3c - 4d } \\ \\ = > (3a + 4b)(3c - 4d) = (3c + 4d)(3a - 4b) \\ \\ = > 9ac - 12ad + 12bc - 16bd = 9ac - 12bc + 12ad - 16bd \\ \\ = > 24bc = 24ad \\ \\ = > \frac{a}{b} = \frac{c}{d} \\ \\Thus \: it \: has \: proved \: that \: a ,\: b ,\: c \: and \: d \: are \: in \: proportion \:$

HENCE PROVED

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