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A series is given with one term missing. Find the missing term in the series. 1/ 4, 13, 41, 126, 382, ?

Mathematics

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Answer

1151\textbf{1151}

Step-by-step solution

3 steps
  1. दिइएको शृङ्खलाका पदहरू बीचको सम्बन्ध पत्ता लगाउनुहोस्।

    शृङ्खला हो: 4,13,41,126,382,?4, 13, 41, 126, 382, ?
    हामी प्रत्येक पदलाई अघिल्लो पदसँग तुलना गर्छौं।
    पहिलो पद a1=4a_1 = 4
    दोस्रो पद a2=13a_2 = 13
    तेस्रो पद a3=41a_3 = 41
    चौथो पद a4=126a_4 = 126
    पाँचौं पद a5=382a_5 = 382

  2. शृङ्खलाको ढाँचा (pattern) निर्धारण गर्नुहोस्।

    हामीले निम्न ढाँचा फेला पार्न सक्छौं: an+1=3an+na_{n+1} = 3a_n + n
    यसलाई जाँच गरौं:
    a2=3a1+1=3(4)+1=12+1=13a_2 = 3a_1 + 1 = 3(4) + 1 = 12 + 1 = 13 (सही)
    a3=3a2+2=3(13)+2=39+2=41a_3 = 3a_2 + 2 = 3(13) + 2 = 39 + 2 = 41 (सही)
    a4=3a3+3=3(41)+3=123+3=126a_4 = 3a_3 + 3 = 3(41) + 3 = 123 + 3 = 126 (सही)
    a5=3a4+4=3(126)+4=378+4=382a_5 = 3a_4 + 4 = 3(126) + 4 = 378 + 4 = 382 (सही)

  3. हराएको पद पत्ता लगाउनुहोस्।

    ढाँचा अनुसार, अर्को पद a6a_6 पत्ता लगाउन, हामी n=5n=5 प्रयोग गर्छौं:

    a6=3a5+5a_6 = 3a_5 + 5 a6=3(382)+5a_6 = 3(382) + 5 a6=1146+5a_6 = 1146 + 5 a6=1151a_6 = 1151

    हराएको पद हो: 1151\textbf{1151}

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