MathematicsEasy179×since 2002Q4237limx→2(∑n=19xn(n+1)x2+2(2n+1)x+4)\mathop {\lim }\limits_{x \to 2} \left( {\sum\limits_{n = 1}^9 {{x \over {n(n + 1){x^2} + 2(2n + 1)x + 4}}} } \right)x→2lim(n=1∑9n(n+1)x2+2(2n+1)x+4x) is equal to :A944{9 \over {44}}449B524{5 \over {24}}245C15{1 \over 5}51D736{7 \over {36}}367Check answerSkip