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⃗<br />
(<br />
| ⃗⃗⃗⃗⃗ | | ⃗⃗⃗⃗⃗ |<br />
)<br />
( )<br />
√<br />
SRE-231<br />
⃗⃗⃗⃗⃗ ( ) =<br />
7.b<br />
⃗⃗⃗⃗⃗ ( ) =<br />
1<br />
⃗⃗⃗⃗⃗⃗<br />
⃗⃗⃗⃗⃗<br />
⃗⃗⃗⃗⃗<br />
8.a<br />
⃗⃗⃗⃗⃗⃗<br />
( ) ( )<br />
( ) ( )<br />
1<br />
1<br />
1<br />
8.b * + * + * + 1<br />
9<br />
Reflection on line y=-x 1<br />
( )<br />
let ( )<br />
or,<br />
Interchanging the place of x and y ,<br />
1<br />
( )<br />
( ) ( )<br />
1<br />
1<br />
( )<br />
Either,<br />
or,<br />
1<br />
3
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