please explain me this sum.whose answer is x €(-infinty,-4]U[-1/2,0)U(0,infinity)
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this question based on inequality ,
(2x +1)(x + 4)/x² ≥ 0
but we know ,
x²≥ 0 for all real value , for definding x ≠ 0 so, x²> 0 for all real value
(2x +1)(x +4) ≥ 0
equate (2x +1) = 0 => x = -1/2
(x +4) = 0 => x = -4
put wave curve line ,
see the figure
then you find answer
x € ( -∞ , -4 ] U [ -1/2 , 0) U ( 0 , ∞ )
(2x +1)(x + 4)/x² ≥ 0
but we know ,
x²≥ 0 for all real value , for definding x ≠ 0 so, x²> 0 for all real value
(2x +1)(x +4) ≥ 0
equate (2x +1) = 0 => x = -1/2
(x +4) = 0 => x = -4
put wave curve line ,
see the figure
then you find answer
x € ( -∞ , -4 ] U [ -1/2 , 0) U ( 0 , ∞ )
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abhi178:
i hope this will help dear !!!!
is positive come over both sides pf zero?
of zero
yeah !!! becoz after -1/2 all real value except x = 0
if you satisfied tap red heart bottom
u r the best
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