數學問題 (new - -) [復制鏈接]

設f(x)=2x^3+px^2+7x+q

當 f(x) 分別除以 x 和 x-1 時 , 餘式圴為 6

(a.) 求 p和q 的值

remainder theorem?

f(x)=x2次 - (k+2)x - 3除以 x-k 的餘式是k+3 , 求k的值

remainder of f(x) when it is divided by x-k is f(k)

f(k)=k^2 - (k+2)k -3 = k+3
-2k-3 = k+3
k = -2

下面是引用kylau於2006-01-26 17:54發表的:
remainder theorem?
f(x)=x2次 - (k+2)x - 3除以 x-k 的餘式是k+3 , 求k的值
remainder of f(x) when it is divided by x-k is f(k)
.......

係呀 , 唔該晒 !

same method as above, but this time sub x=0 and x=1, two equations two unknowns, slove p and q