If the shortest distance between the lines r_1 = i +2 j +2 k + ( i -2 j +2 k ), R, 0 and r_2 =-4 i - k + (3...

Question

If the shortest distance between the lines r_1 = i +2 j +2 k + ( i -2 j +2 k ), R, >0 and r_2 =-4 i - k + (3 i -2 j -2 k ), R is 9, then is equal to _____.

Accepted Answer

6

JEE Main 2021 Mathematics question

Solution