Question: valuate the following integrals using substitution(s) 1. [ 2x( x2 + 1) 23 dx use u = xz + 1 2. [ 4e5x dx 3.


"valuate the following integrals using substitution(s) 1. [ 2x( x2 + 1) 23 dx use u = xz + 1 2. [ 4e5x dx 3. J (1 + cos x) dx 4. [5 cos( nX - 3) dx
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