求高数题完整解题过程
满意采纳下 谢谢
高数问题求解
1.∵p=q=10%
∴X(q^5+q^4+q³+q²+q+1)=200000(q^10+q^9+……+q+1)
X(q^6-1)/(q-1)=200000(q^11-1)/(q-1)
∴X=200000(q^11-1)/(q^6-1)≈200000.2
2.(1)[5000×(p³+p²+p+1)-X]×(1+p)^8-X×(1+p)^7-X×(1+p)^6-……-X=0
5000(1-p^4)(1+p)^8/(1-p)-X[(1+p)^8+(1+p)^7+(1+p)^6+……+1]=0
5000(1-p^4)(1+p)^8/(1-p)-X[(1+p)^9-1]/p=0
∴X=5000p(1-p^4)(1+p)^8/(1-p)[(1+p)^9-1]≈1113.2
帮忙解答一下如下极限题目（高等数学），万分感谢
111高等数学题目，求解详细步骤。谢谢
∂z/∂x = f'(u)*(-1)*y/x^2 (1)
∂z/∂y = f'(u)*1/x (2)
由(1) => x*∂z/∂x = f'(u)*(-1)*y/x (3)
由(2) => y*∂z/∂y = f'(u)*y/x (4)
(3) + (4) = 0
得证