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Let X be the set consisting of the first 2018 term of the arithmetic progression 1,6,11, ….. And Y be the set consisting of the first 2018 terms of the arihtmeic progression 9,16,23,…. . Then , the number of elements in the set `X cup Y ` is ________.

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Let X be the set consisting of the first 2018 terms of the arithmetic progression 1,\ 6,\ 11 ,\ ddot, and Y be the set consisting of the first 2018 terms of the arithmetic progression 9,\ 16 ,\ 23 ,\ ddot . Then, the number of elements in the set XuuY is _____.

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Knowledge Check

  • Let S be the sum of the first n terms of the arithmetic sequence 3, 7, 11, ...., and let T be the sum of the first n terms of the arithmetic sequence 8 , 10 , 12 ,.... For n gt 1 , S = T for

    A
    no value of n
    B
    one value of n
    C
    two values of n
    D
    three values of n

  • The n^(th) term of an arithmetic progression (A.P.) is (3n + 1) : Sum of the first 10 terms of this A.P. is:

    A
    350
    B
    175
    C
    `-95`
    D
    70

  • The first three terms of an arithmetic progression (A. P.) are 1, 9, 17, then the next two terms are:

    A
    25 and 35
    B
    27 and 37
    C
    25 and 33
    D
    none of these

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    The sum of the first three terms of an arithmetic progression is 9 and the sum of their squares is 35. The sum of the first n terms of the series can be

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    The sum of the first n terms of the arithmetical progression 3, 5(1)/(2),8,.... is equal to the 2nth term of the arithmetical progression 16(1)/(2),28(1)/(2),40(1)/(2) . Calculate the value of n.

    The first three terms of an arithmetic progression (A. P.) are 1,9, 17, then the next two terms are:

    The n^(th) term of an arithmetic progression (A.P) is (3n + 1) : Sum of the first 10 terms of this A.P. is :

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