© examsnet.com
Question : 1
Total: 26
If
= 2
+
+ 3
and
= 3
+ 5
− 2
, then find |
×
|
Solution:
Given that
= 2
+
+ 3
and
= 3
+ 5
− 2
We need to find|
×
|
×
= |
|
=
(- 2 - 15) -
(- 4 - 9) +
(10 - 3)
= - 17
+ 13
+ 7
Hence,|
×
| = √ 17 2 + 13 2 + 7 2
⇒|
×
| = √ 507
We need to find
=
= - 17
Hence,
⇒
© examsnet.com
Go to Question: