Question

4. If 1 + 2 + 3+....+ k = 8281then find 1+ 2+ 3+....+ k.

Answer 1

8281 is the answer of the question

Answer 2

Answer:

there is some mistake in data

Step-by-step explanation:

1 + 2 + 3+....+ k = 8281

=> k ( k + 1)/2 = 8281

=> k² + k = 16562

=> k² + k - 16562 = 0

k =( - 1 ± √1²  - 4(1)(-16562) )/2

=> k = ( -1  + √66249 )/2   ( -ve value ignored as k can not be - ve)

=> k = (- 1 + 257.39)/2

k is not an integer

so there is some mistake in data