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1.The first three terms of an …

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1.The first three terms of an AP are respectively (3y_ 1),(3y+5),and (5y+1),find the value of y

    • Posted by Abhishek Tiwari 7 years, 1 month ago

    CBSE > Class 10 > Mathematics
    • 2 answers

    Jiya Kardam 7 years, 1 month ago

    Y = 5

    1Thank You

    Ajay Papnai 7 years, 1 month ago

    The common difference between a1 and a2 Common difference = a2 - a1 =(3y + 5) - (3y - 1) =3y + 5 - 3y + 1 =6. ――1 Now the common difference between a3 and a2 Common difference =a3 - a2 =(5y + 1) - (3y + 5) =5y + 1 - 3y - 5 = 2y - 4 ――2 On equating 1 and 2 we get 2y - 4 = 6 2y = 10 y = 5 So the value of y is 5

    2Thank You

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