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Sol Given Integra) I=int_(0)^(b)f(x)dx Rierann dumsqrt(16-((4)/(n))^(2))*(4)/(n)+sqrt(16-((4*2)/(n))^(2))+(4)/(n)+cdots +sqrt(16-((4.7 )/(n))^(2))-(4)/(n) a) Here b=4b) f(x)=sqrt(16-x^(2))c) So Integral{:[I=int_(0)^(b)f(x)dx],[=int_(0)^(4)sqrt(16-x^(2))dx],[intsqrt(a^(2)-x^(2)) ... See the full answer