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        1                            1----------------  -   --------------------   X(乘) (x+h)x+2    是什麼?       (x+h)+2                  x+2          和h X(乘) (x+h)x+2     是什麼?

2005-08-30 17:59:10 · 3 個解答 · 發問者 changchih 7 in 科學 數學

1 1

---------------- - -------------------- 乘以 (x+h)x+2 是什麼?

(x+h)+2 x+2

2005-08-30 18:08:03 · update #1



h 乘以 (x+h)x+2 是什麼?

2005-08-30 18:08:23 · update #2

1 1

---------------- 減 -------------------- 乘以 (x+h)x+2 是什麼?

(x+h)+2 x+2

2005-08-30 18:09:06 · update #3

吼...................
[1 / (x + h) + 2 ] - [ 1 / x + 2] X (x+h)x-2 = ?

2005-08-30 18:10:39 · update #4

3 個解答

將它看成是x的多項式(h是常數), 並通分之:
[1/(x+h+2)]-{[1/(x+2)]*x(x+h)}+2
分母==>(x+h+2)*(x+2)=x^2+(h+4)x+(2h+4)
分子==>
[(x+2)]-{(x+h+2)*x(x+h)}+[2(x+h+2)*(x+2)]
=[x+2]-{(x^2+hx+2x)*(x+h)}+[(2x+4)*(x+h+2)]
=[x+2]-{x^3+hx^2+2x^2+hx^2+h*h*x+2hx}+[2x^2+2hx+4x+4x+4h+8]
=-x^3-2hx^2+(9-h^2)x+(4h+10)


h(x+h)x+2=hx^2+h*hx+2

2005-08-31 13:04:54 · answer #1 · answered by Anonymous · 0 0

是 -h/x+h+2 嗎

2005-08-30 18:20:58 · answer #2 · answered by 鴻良 2 · 0 0

你ㄉ題目可以在清楚一點...我看不董= =

2005-08-30 18:06:31 · answer #3 · answered by Anonymous · 0 0

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