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Question
Find the mean proportional of the following:
2x, 8x
Sum
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Solution
x = `sqrt(a xx b)`
a = 2x
b = 8x
Mean proportional m:
m = `sqrt(2x xx 8x)`
= `sqrt(16x^2)`
= 4x
∴ The mean proportional of 2x and 8ЁЭСе is 4x.
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Chapter 7: Ratio and proportion - Exercise 7B [Page 125]
