(2^50 ) (x^2 ) sin (2x+50π/2) 为什么等于 2^5(2^50 ) (x^2 ) sin (2x+50π/2) 为什么等于 2^50(- x^2 sin 2x)
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![(2^50 ) (x^2 ) sin (2x+50π/2) 为什么等于 2^5(2^50 ) (x^2 ) sin (2x+50π/2) 为什么等于 2^50(- x^2 sin 2x)](/uploads/image/z/11604370-58-0.jpg?t=%282%5E50+%29+%28x%5E2+%29+sin+%282x%2B50%CF%80%2F2%29+%E4%B8%BA%E4%BB%80%E4%B9%88%E7%AD%89%E4%BA%8E+2%5E5%282%5E50+%29+%28x%5E2+%29++++sin++%282x%2B50%CF%80%2F2%29++++++%E4%B8%BA%E4%BB%80%E4%B9%88%E7%AD%89%E4%BA%8E++2%5E50%28-++x%5E2+sin++2x%29)
(2^50 ) (x^2 ) sin (2x+50π/2) 为什么等于 2^5(2^50 ) (x^2 ) sin (2x+50π/2) 为什么等于 2^50(- x^2 sin 2x)
(2^50 ) (x^2 ) sin (2x+50π/2) 为什么等于 2^5
(2^50 ) (x^2 ) sin (2x+50π/2) 为什么等于 2^50(- x^2 sin 2x)
(2^50 ) (x^2 ) sin (2x+50π/2) 为什么等于 2^5(2^50 ) (x^2 ) sin (2x+50π/2) 为什么等于 2^50(- x^2 sin 2x)
50π/2=24π+π,对于sin(2x+24π+π)=-sinx,接下来就是答案了
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