Ask a Doubt
Request a call back

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

CBSE Class 12-science Answered

<div>using the properties of determinants , solve the following for x :</div> <div>&nbsp;</div> <div>&nbsp;</div> <div>| <strong>X+2&nbsp;&nbsp; X+6&nbsp;&nbsp; X-1</strong>&nbsp;&nbsp; |</div> <div>|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |</div> <div>|<strong> X+6&nbsp;&nbsp; X-1&nbsp;&nbsp; X+2</strong> &nbsp; |&nbsp;&nbsp; = 0</div> <div>|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |</div> <div>| <strong>X-1&nbsp;&nbsp; X+2&nbsp;&nbsp; X+6&nbsp;</strong>&nbsp; |</div>
Asked by shivamthetrisal | 21 Mar, 2015, 06:53: PM
Expert Answer
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 open vertical bar table row cell x plus 2 end cell cell x plus 6 end cell cell x minus 1 end cell row cell x plus 6 end cell cell x minus 1 end cell cell x plus 2 end cell row cell x minus 1 end cell cell x plus 2 end cell cell x plus 6 end cell end table close vertical bar equals 0 A p p l y i n g space R subscript 2 rightwards arrow R subscript 2 minus R subscript 3 space a n d space R subscript 3 rightwards arrow R subscript 3 minus R subscript 1 open vertical bar table row cell x plus 2 end cell cell x plus 6 end cell cell x minus 1 end cell row cell x plus 6 minus x plus 1 end cell cell x minus 1 minus x minus 2 end cell cell x plus 2 minus x minus 6 end cell row cell x minus 1 minus x minus 2 end cell cell x plus 2 minus x minus 6 end cell cell x plus 6 minus x plus 1 end cell end table close vertical bar equals 0 rightwards double arrow open vertical bar table row cell x plus 2 end cell cell x plus 6 end cell cell x minus 1 end cell row 7 cell negative 3 end cell cell negative 4 end cell row cell negative 3 end cell cell negative 4 end cell 7 end table close vertical bar equals 0 rightwards double arrow open parentheses x plus 2 close parentheses open parentheses negative 21 minus 16 close parentheses minus open parentheses x plus 6 close parentheses open parentheses 49 minus 12 close parentheses plus open parentheses x minus 1 close parentheses open parentheses negative 28 minus 9 close parentheses equals 0 rightwards double arrow open parentheses x plus 2 close parentheses open parentheses negative 37 close parentheses minus open parentheses x plus 6 close parentheses open parentheses 37 close parentheses plus open parentheses x minus 1 close parentheses open parentheses negative 37 close parentheses equals 0 rightwards double arrow x plus 2 plus x plus 6 plus x minus 1 equals 0 rightwards double arrow 3 x plus 7 equals 0 rightwards double arrow x equals fraction numerator negative 7 over denominator 3 end fraction
Answered by Vimala Ramamurthy | 23 Mar, 2015, 11:06: AM

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
CBSE 12-science - Maths
open vertical bar table row cell left parenthesis straight b plus straight c right parenthesis hat 2 end cell ab ca row ab cell left parenthesis straight a plus straight c right parenthesis hat 2 end cell bc row ac bc cell left parenthesis straight a plus straight b right parenthesis hat 2 end cell end table close vertical bar equals 2 abc left parenthesis straight a plus straight b plus straight c right parenthesis hat 3
Asked by indupremachandran | 26 May, 2019, 01:08: PM
ANSWERED BY EXPERT
CBSE 12-science - Maths
If A is a 2×2 matrix such that|A|= 5. Find |4A|
Asked by denpeter4 | 30 Apr, 2019, 01:30: PM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Using the properties of determinants,prove that  open vertical bar table row 1 cell straight a squared plus bc end cell cell straight a cubed end cell row 1 cell straight b plus ca end cell cell straight b cubed end cell row 1 cell straight i squared plus ab end cell cell straight C cubed end cell end table close vertical bar = -(a-b)(b-c)(c-a)(a3+b3+c3)   Pls note it is c instead of  i 
Asked by lekhakarthikeyan | 27 Dec, 2018, 02:23: AM
ANSWERED BY EXPERT
CBSE 12-science - Maths
evaluate (solve each and every part) each determinant 67    19        21                          29      26       22                       102     18    36                     39    13        14               (b)      25      31       27        (c)               1        3    4             81    24        26                          63      54       46                         17        3     6   (d)  12   22   32 22    32   42 32     42  52
Asked by haroonrashidgkp | 10 Apr, 2018, 08:44: PM
ANSWERED BY EXPERT
CBSE 12-science - Maths
(x-2)2                    (x-1)2                   x2 (X-1)2                       X2                   (x + 1)2                           =  -8 X2                      (x + 1)2                  (x + 2)2
Asked by haroonrashidgkp | 10 Apr, 2018, 08:35: PM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Express the system of linear equations in matrix form: a1x + b1y + c1z = d1, a2x + b2y + c2z = d2 and a3x + b3y + c3z = d3
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Write the conditions for a solution of a system of linear equations AX = B.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Write the given system of linear equations in matrix form. 2x – 3y = 1, x + 3z = 11 and x + 2y + z = 7.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Find whether the system of linear equation has a unique solution or not. 5x – 10y = 4 and x – 2y = 8.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT
CBSE 12-science - Maths
Ravi purchases 1 pen, 4 pencils and 1 box in Rs. 34. From the same store Neeraj purchases 2 pens, 2 pencils in Rs. 26 and Neetu purchases 1 pen, 3 pencils and 2 boxes in Rs. 43. Express this problem into matrix form.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Free Sample Papers - Click Here
×