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5,√5,1..... എന്ന ശ്രേണിയുടെ n-ാം പദം 1/625 ആണ്. എങ്കിൽ n എന്നത് ................,

A11

B10

C12

D13

Answer:

A. 11

Read Explanation:

GP 5,√5,1......... r=1/√5 1/625=1/(5)⁴=1/((√5)²)⁴=1/(√5)⁸ n=8+3=11


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