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प्रश्न
For what values of x, `4/3, x, 4/27` are in G.P.?
उत्तर
`4/3, x, 4/27` are in geometric progression.
∴ `"t"_2/"t"_1 = "t"_3/"t"_2`
∴ `x/(4/3) = (4/27)/x`
∴ x2 = `4/3 xx 4/27`
∴ x2 = `16/81`
∴ x = `± 4/9`
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