Answer:
Correct option is
A
1,−1/2
For equal roots D=b
2
−4ac=0
⇒[2(m+1)]
−4m(3m+1)=0
⇒m
+2m+1−3m
−m=0
⇒−2m
+m+1=0
⇒2m
−m−1=0⇒(m−1)(m+
1
)=0
⇒m=1,
−1
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