Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

if x2 plus 1/x sqaure = 62 find value of x3 plus 1/x3
Asked by cute_ridhhi18 | 14 Aug, 2015, 07:29: PM
answered-by-expert Expert Answer
G i v e n space t h a t space x squared plus 1 over x squared equals 62 W e space n e e d space t o space f i n d space t h e space v a l u e space o f space x cubed plus 1 over x cubed colon x squared plus 1 over x squared equals 62 rightwards double arrow x squared plus 1 over x squared plus 2 equals 62 plus 2 rightwards double arrow x squared plus 1 over x squared plus 2 x cross times 1 over x equals 64 rightwards double arrow open parentheses x plus 1 over x close parentheses squared equals 8 squared rightwards double arrow open parentheses x plus 1 over x close parentheses equals 8... left parenthesis 1 right parenthesis  A g a i n space c o n s i d e r space t h e space g i v e n space e q u a t i o n colon space x squared plus 1 over x squared equals 62 rightwards double arrow x squared plus 1 over x squared minus 1 equals 62 minus 1 rightwards double arrow x squared plus 1 over x squared minus 1 equals 61... left parenthesis 2 right parenthesis  W e space k n o w space t h a t a cubed plus b cubed equals open parentheses a plus b close parentheses open parentheses a squared minus a b plus b squared close parentheses therefore x cubed plus 1 over x cubed equals open parentheses x plus 1 over x close parentheses open parentheses x squared plus 1 over x squared minus x cross times 1 over x close parentheses equals open parentheses x plus 1 over x close parentheses open parentheses x squared plus 1 over x squared minus 1 close parentheses T h u s comma space x cubed plus 1 over x cubed equals 8 cross times 61 space....... open square brackets f r o m space e q u a t i o n s space left parenthesis 1 right parenthesis space a n d space left parenthesis 2 right parenthesis close square brackets rightwards double arrow x cubed plus 1 over x cubed equals 488
Answered by Vimala Ramamurthy | 16 Aug, 2015, 09:04: AM
CBSE 9 - Maths
Asked by durgavenkatlakshmi1 | 20 Mar, 2024, 03:56: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by ammudeep0123 | 20 Mar, 2024, 07:13: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
..
question image
Asked by as90273 | 12 Feb, 2024, 08:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by farhannzb16 | 05 Feb, 2024, 08:52: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by jaswanthsompi12345 | 19 Dec, 2023, 06:54: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by rizwanmunna406 | 12 Dec, 2023, 10:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by sathishdoddamudigere2 | 01 Nov, 2023, 06:53: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by shambhushanker123 | 29 Oct, 2023, 08:36: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by artigupta0766 | 12 Oct, 2023, 11:47: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by jhanvi3824 | 07 Oct, 2023, 09:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×