Let Sk = (1 + 2..... | JEE Main 2023

JEE MAIN 2023

8-4-2023 S1

Question

Let $S_k=\frac{1+2+\ldots \ldots+K}{K}$ and $\sum_{j=1}^n S_j^2=\frac{n}{A}\left(B n^2+C n+D\right)$, where $A, B, C, D \in N$ and $A$ has least value. Then

Select the correct option:

A + B is divisible by D

A + B = 5 (D - C)

A + C + D is not divisible by B

A + B + C + D is divisible by 5

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Question Tags

JEE Main

Mathematics

Hard

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