29. At a construction site, there are boards that measure 44 Find the relative error of this measurement. Round to the nearest tenth percent.

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A: we have  urr+1rur+1r2uθθ=0..... (i) let us take u=p(θ)q(r)  now  urr=p(θ)q"(r),ur=p(θ)q'(r),…

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