maths2

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|10x - 1| = x - 10


A. -1, 1
B. 1
C. -1
D. No solution

  • maths2 -

    D. No solution

  • maths2 -

    then either

    10x-1=x-10 OR -10x +1 = x-10
    9x = -9 or -11x = -11
    x = -1 or x = +1

    BUT, by definition |of anything| ≥0
    so x-10≥0
    x ≥ 10

    So there is no solution

  • maths2 -

    thank you

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