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If \(x, y, z\) are three consecutive terms of a geometric progression and \(y\ne0\), which of the following relations must be true?

Answer and explanation

Correct answer: \(y^2=xz\)

The consecutive terms can be written as \(x, xr, xr^2\). Hence \(y^2=(xr)^2=x(xr^2)=xz\). The relation \(x+z=2y\) belongs to an arithmetic progression. Exam tip: square the middle term.

Related tags

Geometric ProgressionConsecutive TermsGp PropertySequence ClassificationAlgebraic RelationsSequences And ProgressionsMathematicsClass 9 Mcq

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