Posted by wendy on Wednesday, August 29, 2007 at 6:55pm.
f(t)= (1-t)^(1/2)
chain rule
f'(t)= 1/2(x)^(-1/2)dx
x= 1-t
dx= -1
f'(t)= 1/2(1-t)^(-1/2)(-1)
f'(t)= (-1/2)(1-t)^(-1/2)
f'(t)= -1/(2sqrt1-t)
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