Differentiate (X5-5X+8)(x3+7x+9) in three ways mentioned below

(i) By using product rule.

(ii) By expanding the product to obtain a single polynomial.

(iii By logarithmic differentiation.

Do they all give the same answer?

Question

Differentiate (X5-5X+8)(x3+7x+9) in three ways mentioned below

(i)	By using product rule.

(ii)	By expanding the product to obtain a single polynomial.

(iii	By logarithmic differentiation.

Do they all give the same answer?

mimi_x3 · Answer

Is it: 
$$\large(x^5-5x+8)(x^3+7x+9)$$?

anonymous · Answer

yes,it is..help me now

mimi_x3 · Answer

Well, have you tried the product rule?

mimi_x3 · Answer

u = x^5 -5x +8 => u'=5x^4-5 
v = x^3+ 7x+9 => v' = 3x^2+7
then product rule..

anonymous · Answer

how by logarithmic diffrenciation?