The Nth Term of a Quadratic Sequence


    Find the Nth term of the following sequences:

    Question
    8, 13, 20, 29, 40

    Answer n 2 + 2 n + 5



    Question
    10, 21, 36, 55, 78

    Answer 2 n 2 + 5 n + 3



    Question
    11, 19, 29, 41, 55

    Answer n 2 + 5 n + 5



    Question
    7, 15, 27, 43, 63

    Answer 2 n 2 + 2 n + 3



    Question
    -4, 0, 8, 20, 36

    Answer 2 n 2 − 2 n − 4



    Question
    2, 10, 22, 38, 58

    Answer 2 n 2 + 2 n − 2



    Question
    1, 0, 1, 4, 9

    Answer n 2 − 4 n + 4



    Question
    -7, -8, -7, -4, 1

    Answer n 2 − 4 n − 4



    Question
    5, 30, 65, 110, 165

    Answer 5 n 2 + 10 n − 10



    Question
    19, 39, 67, 103, 147

    Answer 4 n 2 + 8 n + 7



    Question
    2, 11, 30, 59, 98

    Answer 5 n 2 − 6 n + 3



    Question
    22, 42, 70, 106, 150

    Answer 4 n 2 + 8 n + 10



    Question
    1.5, 13.5, 31.5, 55.5, 85.5

    Answer 3 n 2 + 3 n − 4.5



    Question
    12.5, 22, 36.5, 56, 80.5

    Answer 2.5 n 2 + 2 n + 8



    Question
    8, 27, 53, 86, 126

    Answer 3.5 n 2 + 8.5 n − 4



    Question
    -10.5, -13, -14.5, -15, -14.5

    Answer 0.5 n 2 − 4 n − 7



    Question
    -17.5, -24.5, -30.5, -35.5, -39.5

    Answer 0.5 n 2 − 8.5 n − 9.5



    Question
    -15.5, -17.5, -14.5, -6.5, 6.5

    Answer 2.5 n 2 − 9.5 n − 8.5



    Question
    2.5, 23.5, 53.5, 92.5, 140.5

    Answer 4.5 n 2 + 7.5 n − 9.5



    Question
    -7.5, -3, 7.5, 24, 46.5

    Answer 3 n 2 − 4.5 n − 6



12th October 2019

Contact us:

Call us: 01483 600 483

Email: contact@localtutor.org.uk

Address: Local Tutor, First Floor, Cleary Court, Church Street East, Woking GU21 6HJ

top
Copyright 2019 localtutor.org.uk