Question

The value of $\frac{2^{n + 1} - 1}{n + 1}$is.

• A. 252
• B. 352
• C. 452
• D. 532

Answer 1

Answer: (B)

352

Answer 2

$y = 3x + 6x^{2} + 10x^{3} + ....$

$\therefore 1 + y = 1 + 3x + 6x^{2} + 10x^{3} + ...$