1.

The sum to n terms of the series 0.5 + 0.55 + 0.555 + …………………… isA) \(\cfrac{5n}9\) - \(\cfrac{5}{81}\) \((1-\cfrac{1}{10^n})\)B)  \(\cfrac{5n}9\) + \(\cfrac{5}{81}\) \((1+\cfrac{1}{10^n})\) C)  \(\cfrac{5n}9\) - \(\cfrac{5}{81}\) \((\cfrac{1}{10^n}-1)\) D)  \(\cfrac{5n}9\) + \(\cfrac{5}{81}\) \((1-\cfrac{1}{10^n})\) 

Answer»

Correct option is A) \(\cfrac{5n}9\) - \(\cfrac{5}{81}\) \((1-\cfrac{1}{10^n})\)



Discussion

No Comment Found