Question

$\sqrt[3]{1 + 3 + 5 + 7 + ...... + 685}$
(C) 49
(E) None of these
(B) 27
(D) 7​

Answer 1

Answer:

$\sqrt[3]{1 + 3 + 5 + ....... + 685} = \sqrt[3]{ \frac{343}{2} (1 + 685)} \\ = \sqrt[3]{ \frac{343 \times 686}{2} } = \sqrt[3]{343 \times 343}$

None of these