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  1. Top | #109

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    $Q61)9^{\left | x+3 \right |}=\sqrt{9}^{-2x+1}$

    $Q62)2^{2-4x} \sqrt{9}^{6x-3}=1$
    ; 11-30-2017 12:32 AM

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  3. Top | #110

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  5. Top | #111

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    ; 11-30-2017 10:59 PM

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  7. Top | #112

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    http://alnasiry.net/forums/uploaded/...1512073873.gif

    [
    URL="http://alnasiry.net/forums"][/URL]
    ; 12-02-2017 02:11 PM

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  9. Top | #113

    Sep 2013
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    $Q63)solve .in. [0,2\pi ]:log_{sinx}cosx=1$
    ; 12-23-2017 12:10 AM

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  11. Top | #114

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  13. Top | #115

    Apr 2012
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  15. Top | #116

    Feb 2011
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    ҡ
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    \[\begin{array}{l}
    1.\,\,\,0 < \cos x < 1\,\,\,\, \Rightarrow {D_1}: - \frac{\pi }{2} < x < \frac{\pi }{2}\,\,\,\,\,\,\, \\
    2.\,\,\,0 < \sin x < 1\,\,\,\, \Rightarrow {D_2}:0 < x < \frac{\pi }{2}\,\,\,\,\,\,\,or\,\,\,\,\,\frac{\pi }{2} < x < \pi \\
    {D_1} \cap \,{D_2} = \left\{ {x:0 < x < \frac{\pi }{2}} \right\} \\
    \end{array}\]




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  17. Top | #117

    Sep 2013
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    $Q64)(26+15\sqrt{3})^{x}-5(7+4\sqrt{3})^{x}+6(2+\sqrt{3})^{x}+(2-\sqrt{3})^{x}=5$

    $Q65)x^{2}-\frac{1}{2}=\sqrt{x+\frac{1}{2}}$

    ; 01-05-2018 12:12 AM

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  19. Top | #118

    May 2014
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  21. Top | #119

    Sep 2013
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    $Q66)x^{log_{7}4}+5(2^{log_{7}x})-4=0$

  22. Top | #120

    Sep 2013
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    $Q67)\left \lfloor x+y+4 \right \rfloor=18-y$
    $\left \lfloor x+1 \right \rfloor+\left \lfloor y-1 \right \rfloor=18-x-y$

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