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JEE MATHEMATICS MCQ: PERMUTATIONS

1 Easy

1 of 1

Application +4 | -1

A_1, A_2 \ldots A_n

are points on the line

y=x

lying in the positive quadrant such that

O A_n=n O A_{n-1}, O

being the origin. If

O A_1=1

and the coordinates of

A_n

are

(2520 \sqrt{2}, 2520 \sqrt{2})

, then

n=

View answer and explanation

Correct option: C

7

Option C (7) is correct because

OA_n = n!

and solving for

n

with the given coordinates of

A_n

gives

n = 7

.

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