directional derivatives I

2010-11-12 4:26 am

wt do i need to do in order to get to the answer!?
plz show me the important steps~~*

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更新1:

i guess not...coz i actually worked out i and ii... direction of (1,1,0) means (1+1)i + (1+2)j + (0-1)k yeh!?

回答 (2)

2010-11-14 5:49 am

✔ 最佳答案

Please check if your question or answer for (ii) has any mistake?

2010-11-13 21:38:01 補充：
I see, I wrongly interpret (1,1,0) as a vector!!!

2010-11-13 21:49:13 補充：
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圖片參考：http://img811.imageshack.us/img811/6533/55103050.png

2010-11-13 21:49:25 補充：
http://img811.imageshack.us/img811/6533/55103050.png

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2010-11-14 5:58 pm

yeh that's wt i thought in the beginning!! like 1i+1j+0k.. haha! xD

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