भूमितीय श्रेढीमधील पाच संख्या अशा आहेत की त्यांचा गुणाकार 32 आहे. तर तिसरी संख्या शोधा.

  1. 4
  2. 1/2
  3. 2
  4. 8

Answer (Detailed Solution Below)

Option 3 : 2
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Detailed Solution

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दिलेल्याप्रमाणे:

भूमितीय श्रेढीमधील 5 संख्यांचा गुणाकार = 32

गणना:

समजा, भूमितीय श्रेढीमधील पाच संख्या ar2, ar, a, a/r, a/r2 आहेत.

⇒ ar2  × ar ×  a ×  a/r ×  a/r2 = 32

⇒ a5 = 32

⇒ a5 = 25 

घात समान आहेत म्हणून पाया समान घेऊ,

a = 2

a ही भूमितीय श्रेढीची तिसरी संख्या असेल.

∴ तिसरी संख्या 2 आहे.

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