The indefinite integral is the anti-derivative - so the question is, "What function has this given function as a derivative". And if you add a constant to a function, the derivative of the function doesn't change. Thus, for example, if the derivative is y' = 2x, the original function might be y = x squared. However, any function of the form y = x squared + c (for any constant c) also has the SAME derivative (2x in this case). Therefore, to completely specify all possible solutions, this constant should be added.
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I depends on the problem. The rate constant is different depending on the problem in which it occurs.
the coefficient is 46 and the constant is 0
My suggestion is to multiply the binomials and do the integration directly, and then differentiate the result with respect to x. (If that doesn't work, feel free to send me a picture of the problem and I'll give it another try.)
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In order to work out this problem, we need to learn how to apply the integration method correctly.The given expression is ∫ 2xln(2x) dx.Instead of working out with 2x's, we let u = 2x. Then, du = 2 dx or du/2 = dx. This method is both valid and easy to avoid working out with too much expressions. You should get:∫ uln(u) (du/2)= ½ ∫ uln(u) duUse integration by parts, which states that:∫ f(dg) = fg - ∫ g(df)We let:f = ln(u). Then, df = 1/u dudg = u du. Then, g = ∫ u du = ½u²Using these substitutions, we now have:½(½u²ln(u) - ½∫ u du)= ¼(u²ln(u) - ∫ u du)Finally, by integration, we obtain:¼ * (u²ln(u) - ½u²) + c= 1/8 * (2u²ln(u) - u²) + c= 1/8 * (2(2x)²ln(u) - (2x)²) + c= 1/8 * (2x)² * (2ln(u) - 1) + c= ½ * x² * (2ln(2x - 1)) + c