Chapter 2

In Problems 125-132, write each sum in sigma notation. \(2+4+6+8+\cdots+2 n\)

Write each sum in sigma notation. \(\frac{1}{\sqrt{1}}+\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{3}}+\frac{1}{\sqrt{4}}\)

Write each sum in sigma notation. \(\ln 2+\ln 3+\ln 4+\ln 5\)

Write each sum in sigma notation. \(\frac{3}{5}+\frac{4}{6}+\frac{5}{7}+\frac{6}{8}+\frac{7}{9}\)

Write each sum in sigma notation. \(-\frac{1}{4}+\frac{1}{6}+\frac{2}{7}+\frac{3}{8}\)

Write each sum in sigma notation. \(\frac{1}{1}+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\cdots+\frac{1}{2^{n}}\)

Write each sum in sigma notation. \(1+q+q^{2}+q^{3}+q^{4}+\cdots+q^{n-1}\)

Write each sum in sigma notation. \(1-a+a^{2}-a^{3}+a^{4}-a^{5}+\cdots+(-1)^{n} a^{n}\)