a.   4

b.   2

c.  0

d.  1
in Other Math Topics by

Please clarify what '' means and provide the limits for the definite integral.

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1 Answer

If the question is ∫|x-1|dx in the interval [0,2] meaning the limits are 0 to 2, then we can write:

∫|x-1|dx=∫(1-x)dx[0,1] + ∫(x-1)dx[1,2]=

(x-½x²)[0,1]+(½x²-x)[1,2]=1-½+(4/2-2)-(½-1)=

½+0+½=1.

A different answer will result if different limits are applied. For example, [-1,3] will give the answer 4 if '' is just a typing error or a symbol that has no effect on the result. If '' means squared (²) for example, the answer will be different again. Note that, if you do not have superscript facilities on your keyboard, you can use x^2 to mean the same as x², etc. You can use words to express other symbols: integral(x^2dx) can be used to mean ∫x²dx, the indefinite integral. Definite integrals need limits and I use square brackets: [low limit,high limit]. Otherwise just state the limits in words.

The question doesn’t give the limits or say what '' means. Without this information no answer can be given.

by Top Rated User (1.2m points)

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