CBSE Class 9 Answered
Sorry sir, the previous question was wrong. the real question goes like this:
Asked by Sthitaprajna Mishra | 24 Sep, 2013, 08:20: AM
Expert Answer
1/(1 + x + y-1) + 1/(1 + y + z-1) + 1/(1 + z + x-1)
1/(1 + x + y-1) + 1/(1 + y + xy) + 1/(1 + 1/xy + 1/x)
(since xyz = 1)
= 1/(1 + x + 1/y) + 1/(1 + y + xy) + 1/(1 + 1/xy + 1/x)
= y/(y + xy + 1) + 1/(y + xy + 1) + xy/(xy + 1 + y)
= (y + 1 + xy)/(y + xy + 1)
= 1
1/(1 + x + y-1) + 1/(1 + y + xy) + 1/(1 + 1/xy + 1/x)
(since xyz = 1)
= 1/(1 + x + 1/y) + 1/(1 + y + xy) + 1/(1 + 1/xy + 1/x)
= y/(y + xy + 1) + 1/(y + xy + 1) + xy/(xy + 1 + y)
= (y + 1 + xy)/(y + xy + 1)
= 1
Hence, proved.
Answered by | 24 Sep, 2013, 09:00: AM
Concept Videos
-
Recall the concept of number line and discuss its importance in day to day... -
This video explains how to differentiate between rational and irrational nu... -
This video covers the definition of real numbers, difference between the ra... -
This video explains the statement of the laws of exponents and simplify exp... -
This video covers examples on graphical representation of whole numbers, in...
Application Videos
-
This video contains a question which is solved using law of exponents -
This video contains a question which is solved using law of exponents -
This video involves the question which proves a given number is irrational -
This video explains how to find the irrational numbers between two decimal ... -
This video contains a question which is solved using law of exponents
CBSE 9 - Maths
Asked by zbano7424 | 07 Jul, 2022, 08:18: PM
ANSWERED BY EXPERTCBSE 9 - Maths
Asked by yadram9728853493 | 25 Jun, 2022, 11:16: AM
ANSWERED BY EXPERTCBSE 9 - Maths
Asked by devenderjuneja7 | 20 Jun, 2022, 02:42: PM
ANSWERED BY EXPERTCBSE 9 - Maths
Asked by boppudiaruna1983 | 11 Jun, 2022, 10:14: AM
ANSWERED BY EXPERTCBSE 9 - Maths
Asked by prashanthprashanth38217 | 06 Jun, 2022, 10:04: PM
ANSWERED BY EXPERTCBSE 9 - Maths
Asked by suzanesharma307 | 22 May, 2022, 05:56: PM
ANSWERED BY EXPERTCBSE 9 - Maths
Asked by Khetwanikaran9 | 18 May, 2022, 07:49: PM
ANSWERED BY EXPERTCBSE 9 - Maths
Asked by nisalya.thakkar | 17 May, 2022, 10:32: AM
ANSWERED BY EXPERTCBSE 9 - Maths
Asked by sunaina.sharma1202 | 07 May, 2022, 08:54: PM
ANSWERED BY EXPERT