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March 1, 2015

March 1, 2015

Posted by **vicki** on Monday, October 10, 2011 at 1:29pm.

- calculus -
**Steve**, Monday, October 10, 2011 at 2:47pmHere goes:

F(x) = f(xf(xf(x)))

F'(x) = f'(xf(xf(x))) * (xf(xf(x)))'

= f'(1*f(1*f(1))) * (xf(xf(x)))'

= f'(f(2)) * (xf(xf(x)))'

= f'(3) * (xf(xf(x)))'

= 6 * (xf(xf(x)))'

= 6 * (f(xf(x)) + xf'(xf(x)))

= 6 * (f(2) + xf'(2))

= 6 * (3 + 5)

= 6*8

= 48

Any other takers? Did I miss a step somewhere?

- calculus -
**Mgraph**, Monday, October 10, 2011 at 3:26pmF(x) = f(xf(xf(x)))

F'(x) = f'(xf(xf(x))) d/dx xf(xf(x))

F'(x) = f'(xf(xf(x))) [ f(xf(x)) + xf'(xf(x)) d/dx xf(x) ]

F'(x) = f'(xf(xf(x))) [ f(xf(x)) + xf'(xf(x)) [f(x) + xf'(x)] ]

F'(1) = f'(1*f(1*f(1))) [ f(1*f(1)) + 1*f'(1*f(1)) [f(1) + 1*f'(1)] ]

F'(1) = f'(f(f(1))) [ f(f(1)) + f'(f(1)) [f(1) + f'(1)] ]

F'(1) = f'(f(2)) [ f(2) + f'(2) [2 + f'(1)] ]

F'(1) = 6 [ 3 + 5 [2 + 4] ]

F'(1) = 6 [ 3 + 5 *6 ]

F'(1) = 6 [ 3 + 30 ]

F'(1) = 6 [ 33 ]

F'(1) = 196

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