An irrational number between 5 and 6 is
(a)12(5+6) (b)√5+6 (c)√5×6 (d) none of these
The nth term of the sequence 5×(1+6),10×(2+6),15×(3+6)___ is
The shortest distance between the lines →r=3→i+5→j+7→k+λ(→i+2→j+→k) and →r=−→i−→j−→k+μ(7→i−6→j+→k) is