csat-suneung 2015 Q9

csat-suneung · South-Korea · csat__math-B 3 marks Indefinite & Definite Integrals Definite Integral as a Limit of Riemann Sums
For the function $f ( x ) = \frac { 1 } { x }$, what is the value of $\lim _ { n \rightarrow \infty } \sum _ { k = 1 } ^ { n } f \left( 1 + \frac { 2 k } { n } \right) \frac { 2 } { n }$? [3 points]
(1) $\ln 6$
(2) $\ln 5$
(3) $2 \ln 2$
(4) $\ln 3$
(5) $\ln 2$
For the function $f ( x ) = \frac { 1 } { x }$, what is the value of $\lim _ { n \rightarrow \infty } \sum _ { k = 1 } ^ { n } f \left( 1 + \frac { 2 k } { n } \right) \frac { 2 } { n }$? [3 points]\\
(1) $\ln 6$\\
(2) $\ln 5$\\
(3) $2 \ln 2$\\
(4) $\ln 3$\\
(5) $\ln 2$