Need help in AP calculus!!!
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Need help in AP calculus!!!

[From: ] [author: ] [Date: 11-10-07] [Hit: ]
Explain.Thanks guys hope to hear good answer from you guys.-a) ..b) No , f = { 2 ,......
Let f(x) = x^2 for x ≤ 3 and
Ax + B for x > 3
a) use the definition of the derivative to find A and B so that f '(3) exists. Justify your answer
b) Does f ' ' (3) exist? Explain.
Thanks guys hope to hear good answer from you guys.

-
a) ..A = 6 & B = -9 { from continuity considerations }

b) No , f ' ' = { 2 , x < 3 and 0 for x > 3 }
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