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श्रेणी 4+12+36+...का 8 वाँ पद ज्ञात कीजिए |
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Answer» Correct Answer - 8748 (i) `T_(1)=4,T_(2)=12,T_(3)=36` `(T_(2))/(T_(1))=(T_(3))/(T_(2))=3`,(अचर) `a=4,r=3 :.a_(8)=ar^(8-1)=ar^(7)=4(3)^(7)=8748` |
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