cho ph ng tr nh x 2 3x m 2 1 0 C u 33 Cho ph ng tr nh sin 2x m X t t nh ng sai c a c c ph t bi u sau a V i m 0 ph ng tr nh c nghi m l x k 2 b Ph ng tr nh c nghi m l x 3 khi m 1 2 c
Answer 4 m 5 or m 1 Explanation 1 Substitute m 1 into the equation to get x 2 4x 3 0 x2 4x 3 0 2 Factorize the equation to x 1 x 3 0 then x 1 or x 3 3 Substitute x 3 into Answer C u 1 Ta c frac x 2 frac y 3 1 leq 0 2x 3y 1 0 x y l s nguy n d ng ta th c c tr ng h p x v y th a m n b t ph ng tr nh Khi x 2 y 3 Khi x 4 y 3
cho ph ng tr nh x 2 3x m 2 1 0
cho ph ng tr nh x 2 3x m 2 1 0
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C ch Xem V C p Quy n Truy C p ng D ng Tr n IPhone IPad C c D
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Voopoo ITO Coils 1 0 Ohm 5 St ck Be vape
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Solution By Steps Step 1 Find the Discriminant of the Quadratic Equation The discriminant of a quadratic equation ax 2 bx c 0 is given by D b 2 4ac For the B i 1 Cho ph ng tr nh 2 4 0 2 2 x x m 1 tham s m Ch ng minh r ng 1 lu n c hai nghi m ph n bi t v i m i m L p m t ph ng tr nh b c hai c hai nghi m l 1 1 1 1 x y x
T m m h c nghi m d ng B i 14 Cho h a Gi i h ptr nh khi m 2 b Gi i h ptr nh theo tham s m c T m m h c nghi m x y tho m n x y 1 d T m h th c li n h gi a x v p n Gi i th ch c c b c gi i Ph ng tr nh 2x2 2m 1 x m 1 0 1 1 Thay m 2 v o ph ng tr nh 1 ta c 2x 2 3x 1 0 C a b c 2 3 1 0 Ph ng tr nh 1 c
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cho ph ng tr nh x 2 3x m 2 1 0 - B i 1 Cho ph ng tr nh 2 4 0 2 2 x x m 1 tham s m Ch ng minh r ng 1 lu n c hai nghi m ph n bi t v i m i m L p m t ph ng tr nh b c hai c hai nghi m l 1 1 1 1 x y x