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प्रश्न
If a, b, c are in proportion, then
विकल्प
a2 = bc
b2 = ac
c2 = ab
none of these
उत्तर
b2 = ac
Given:
a, b, c are in proportion.
a : b :: b : c
Product of means = Product of extremes
⇒ b2 = ac
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