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{ “x” is an integer such that x^2=2), then elements of the set​

By Amara

{ “x” is an integer such that x^2=2), then elements of the set​

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Amara

the lifetimes of 400 light-bulbs were found to the nearest hour.the result were recorded as follows. lifetime(hour):0-199 200-399

Q. 1) Cost of a notebook is 12 and that of a pen is rs 15. Find the ratio of the cost of
a notebook to the cost of a pen.​

2 thoughts on “{ “x” is an integer such that x^2=2), then elements of the set​”

  2. Step-by-step explanation:

    C = (x:x is an integer; x

    2

    ≤4 )

    It can be seen that

    (−1)

    2

    =1≤4;(−2)

    2

    =4≤4;(−3)

    2

    =9>4

    0

    2

    =0≤4

    1

    2

    =1≤4

    2

    2

    =4≤4

    3

    2

    =9>4

    ∴C=−2,−1,0,1,2

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