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Question : 11 of 120
Marks:
+1,
-0
Solution:
The unit vector along
m+2+3 is
‌=‌ Now,
⇒‌=2 Squaring on both sides, we get
⇒‌(m+8)2=4(m2+13) ⇒‌m2+16m+64=4m2+52 ⇒‌3m2−16m−12=0 ⇒‌m=6,−‌ ⇒‌m=6 as
− is not possible.
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