Wb Jee
Limits Continuity And Differentiability
WB JEE 2011
MCQ+1 / -0.252011
The value of \(\mathop {\lim }\limits_{x \to 1} {{x + {x^2} + ..... + {x^n} - n} \over {x - 1}}\) is
Wb Jee
WB JEE 2011
The value of \(\mathop {\lim }\limits_{x \to 1} {{x + {x^2} + ..... + {x^n} - n} \over {x - 1}}\) is