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    $36)5(0.04)^{sin^{2}x}+4(5)^{cos2x}=5^{sin2x}, in: \left[ 0,2pi \right ]$

    $Q37)3^{1+sinx+sin^{2}x+sin^{3}x+...}=\sqrt[3]{9},in\left [ 0,2\pi \right ]$

    $Q38)2^{-1+cosx-cos^{2}x+...}=\sqrt[3]{0.25},in\left [ 0,2\pi \right ]$
    ; 01-20-2017 11:49 PM

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  3. Top | #62

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  5. Top | #63

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    $Q39)1+2^{tanx}=3(4^{\frac{sin(\frac{\pi }{4}-x)}{\sqrt{2}cosx}}),in \left [ 0,2\pi \right ]$

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  7. Top | #64

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    [/URL]
    ; 01-21-2017 01:20 PM

  8. Top | #65

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    [IMG][/URL][/IMG]

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  10. Top | #66

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    ; 01-22-2017 07:56 PM

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  12. Top | #67

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    $Q40)show that:\left \lfloor \sqrt{n(n+1)(n+2)(n+3)} \right \rfloor=n^{2}+3n,n\in N$
    ; 01-28-2017 11:13 PM

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  16. Top | #69

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    $Q41)\left \lfloor 2\pi \right \rfloor+\left \lfloor \frac{\left \lfloor 3\pi \right \rfloor}{2} \right \rfloor+\left \lfloor \frac{\left \lfloor 4\pi \right \rfloor}{3} \right \rfloor+...+\left \lfloor \frac{\left \lfloor 2017\pi \right \rfloor}{2016} \right \rfloor$
    ; 02-14-2017 07:57 AM

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  18. Top | #70

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  19. Top | #71

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  21. Top | #72

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    2 3 .

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