GROUP C

Task 2.

There should be f''(x)= 6x-12 and the inflection point is 2 not sqrt(2).

GROUP D

Task 4.

The bounds of the integral in a somewhat magical way changed from -1,1 to 0,1.

i.e.
changed into
.

The correct bounds are of course -1,1 and the area is '4'.

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