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1+2+3+...+49+50+49+...+3+2+1...

`1+2+3+...+49+50+49+...+3+2+1`

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Find the sum of 1 + 2 + 3 + …………… + 50 + 49 + ……… + 3 + 2 + 1

If t_n denotes the nth term of the series 2+3+6+11+18+... then t_(50) =...... 49^2-1 b. 49^2 c. 50^2+1 d. 49^2+2

The additive inverse of S, where S = 1 - 2 + 3 - 4 + 5 - 6 + 7 - 8 + …. + 49 - 50 is

If t_n denotes the nth term of the series 2+3+6+11+18+... then t_(50) a. 49^2-1 b. 49^2 c. 50^2+1 d. 49^2+2

If t_n denotes the nth term of the series 2+3+6+11+18+... then t_(50) a. 49^2-1 b. 49^2 c. 50^2+1 d. 49^2+2

If t_n denotes the nth term of the series 2+3+6+11+18+... then t_(50) a. 49^2-1 b. 49^2 c. 50^2+1 d. 49^2+2

The coefficient of x^(49) in the product (x - 1) (x - 2) (x - 3) ......... (x - 50) is