高等数学求导,就这道题,能否写下解题过程?
3个回答
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f(x)
=x^2.sin(1/x) ; x>0
=ax+b ; x≤0
f(0+)=lim(x->0) x^2.sin(1/x) =0
f(0-) = b
=>b=0
f'(0+)
=lim(h->0) [h^2.sin(1/h) -f(0)]/h
=lim(h->0) h.sin(1/h)
=0
f'(0-) = a
=> a=0
(a,b)=(0, 0)
=x^2.sin(1/x) ; x>0
=ax+b ; x≤0
f(0+)=lim(x->0) x^2.sin(1/x) =0
f(0-) = b
=>b=0
f'(0+)
=lim(h->0) [h^2.sin(1/h) -f(0)]/h
=lim(h->0) h.sin(1/h)
=0
f'(0-) = a
=> a=0
(a,b)=(0, 0)
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不好意思,打扰了
=lim(h->0) [h^2.sin(1/h) -f(0)]/h
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