INTEGRATION BY SUBSTITUTION
Prof McFarland seeks comment on this page.

Since the Chain rule tells us   dy
dx		  =  dy
du		 . du
dx		   , we may anti-differentiate both sides to get:
y(x) =   dy
du		 . du
dx		 dx . To use this tool, we must first choose a "u": see METHODS.

[1]
In finding 3x ( x2 + 8 )8dx , mark the correct "u" and copy it to the answer box below.
  Use left mouse button to highlight u =
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[2]
In finding (3x2 - 1 ) ex3 - xdx  , mark the correct "u" and copy it to the answer box below.
  You choose u =
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[3]
In finding
2x4
x5 + 1
dx , mark the correct "u" and copy it to the answer box below.
  You choose u =  
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[4]
In finding     1    
x x		  dx   , mark the correct "u" and copy it to the answer box below.
  You choose u =  
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[5]
In finding ( x + 1 )( x - 2 )9 dx , mark the correct "u" and copy it to the answer box below.
  You choose u =
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Could you solve this problem using Integration by Parts?
[6]
In finding
4x3 + 6x2 - 1

x4 + 3x2 - x
dx,   mark the correct "u"; copy it to the answer box below.
  You choose u =
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[7]
In finding ( x + 1 ) dx , mark the correct "u" and copy it to the answer box below.
  You choose u =
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