Q If 1 (0!) + 3 (1!) + 7 (2!) + 13 (3!) + 21 (4!) + - Maths - Sequences and Series

Question

Q If 1 (0!) + 3 (1!) + 7 (2!) + 13 (3!) + 21 (4!) + upto terms =
(4000)4000! , then the value of n is

(A) 4000 (B) 4001 (C) 3999 (D) none of these

Decoder_6 · Accepted Answer

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Q. If 1.(0!) + 3. (1!) + 7. (2!) + 13.(3!) + 21.(4!) + .....upto terms = (4000)4000! , then the value of n is (A) 4000 (B) 4001 (C) 3999 (D) none of these