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    Completing Integral problem using substitution: Integral [ ( ln sqr(x) ) / x ] dx

    I've used "View an example" on the Pearson website for a Integral problem using substitution. I understand the process the example had until I got to the end. The problem is an indefinite integral Integral [ ( ln sqr(x) ) / x ] dx The answer came out to ( ln sqr(x) )^2 + C The part I...
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    Tangents and the Derivative of V=(4/3)* π * r^3 at a point (r = 4)

    What is the rate of change of the volume of a ball V=(4/3)* π * r^3 with respect to the radius when the radius is equals=4​? The volume changes at a rate of? (Type an exact​ answer, using pi as​ needed.) So i started with r = 4, insert into the equation. V=(4/3)*pi*r^3 V= (4/3)*pi*(4)^3...
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    Continuity lim x->-13*pi/14 cos(7x - cox(7x))

    Help please I should be able to just apply x into the function but I'm having trouble solving lim x->-13*pi/14 cos(7x-cox(7x)) I get to cos(-13*pi/2 - cos(-13*pi/2)) what next? Thanks
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