MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade: 10
        x +1/x=4 then find x^5+1/x^5=?  Please hivee answer whith clearly
3 years ago

Answers : (3)

manna
59 Points
							
x+1/x=4
and we need to find x^5+1/x^5
first of all to make a power of 5 weneed to cube it.
(x+1/x)^3=4^3
apply formula (a+b)^3=a^3+b^3+3ab(a+b)
x^3+1/x^3+3x*1/x(x+1/x)=64
x^3+1/x^3+3*4   =64 Because x+1/x=4 and x*1/x=1
x^3+1/x^3+12=64
x^3+1/x^3=52
now we need to do  is
(x^3+1/x^3)^2=(52)^2
apply formula (a+b)^2=a^2+b^2+2ab
(x^3)^2+(1/x^3)^2+2x^3*1/x^3=2704
x^5+1/x^5+2=2704
x^5+1/x^5=2702---------hence answered
3 years ago
ROHIT mishra
13 Points
							GivenX+1/x=3=a (let)X^2+1/x^2=a^2-2And X^3+1/x^3=a^3-3aThan x^5+1/x^5={x^2+1/x^2}×{x^3+1/x^3}-{x+1/x}I,e. 18×7-3=123
						
2 years ago
Shubham
11 Points
							x+1/x=4x³+1/x³=52Multiplying both side by x²+1/x²(x³+1/x³)(x²+1/x²)=52(x²+1/x²)x^5+x+1/x^5+1/x=52*14x^5+1/x^5+4=728X^5+1/x^5=728-4=724
						
2 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 53 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details