Question

The mean proportional between 0.5 and 128 is​

Answer 1

/* We know that, */

$If \: 'b' \: is \:the \: mean \: proportional \\between \: a \: and \: c , \:then$

$\blue{ b^{2} = ac } \implies \pink{ b = + \sqrt{ac}}$

$Here, a = 0.5 \:and \: c = 128$

$\red{ Mean \: proportional \: between \: 0.5 }\\\red{and \: 128} = \sqrt{0.5 \times 128} \\= \sqrt{64} \\= \sqrt{8^{2}} \\= 8$

Therefore.,

$\red{ Mean \: proportional \: between \: 0.5 }\\\red{and \: 128} \green {= 8}$

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Answer 2

Answer:

8 is the right answer

8

8

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