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  1. M

    Mass of a triangle

    i think i got it now the answer is 40kg? is this correct
  2. M

    Mass of a triangle

    thanks for that i have now got to the part of 10x/2 dx im not to sure how to integrate this, should i do it in parts or substitution?
  3. M

    Mass of a triangle

    hi i am having great difficulties doing this i was wondering if anyone could start me of thanks, a triangle is formed by the x, y - axes and the line x+2y=4. the density is given by f(x,y)= 2y. I know that i need to convert the line for y but from there on i have no idea, much abliged
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