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Question : 6 of 120
Marks:
+1,
-0
Solution:
⟂(+)⇒⋅(+)=0 ⇒⋅+⋅=0...(i)
⟂(+)⇒⋅(+)=0 ⇒⋅+⋅=0....(ii)
⟂(+)⇒⋅(+)=0 ⇒⋅+⋅=0....(iii)
Adding Eqs. (i), (ii) and (iii), we get
â‹…+â‹…+â‹…=0.........(iv)
Now,
Similarly,
|+|=4√3 and
|+|=4 Adding Eqs. (v), (vi) and (vii), we get
=100 [using Eq.(iv)]
Now,
(++)2 =50    [using Eqs. (iv) and (viii)]
⇒|++|=5√2
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