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CBSE Class 10 Answered

x(x+1)^2(x+2)-72=0
(a+x)^2/3+(a-x)^2/3=4(a^2-x^2)^1/3
3x^1/2n-x^1/n 
x^x(x)^1/2=[x(x)^1/2]^x    xnot  equal  to  1
[7+4(3)^1/2]^x^2-4x-3+[7-4(3)^1/2]^x^2-4x+3=14
 
a group of  students  decided to bus tape recorder from  170 to195 rupees .but at 4he last moment two students  backed out of  the decision so that the  remaining  students had to pay are  rupee  each  more than  they  had planned  what  was  the  price of tape  recorder if  students  paid  equal  share
 
pole. has  to  be erected at  a  pointon the   boundary of  a  circular park  of  diameter 13  meters  in  such  a  way  that  difference  of  its   distances  from  two  diametrically opposite fixed   gate  Aand B  on  the  boundaryis  7m.whats the  distance from   two  gates  should the  pole  be  erected 
Asked by vinay110 | 09 Nov, 2015, 11:21: PM
answered-by-expert Expert Answer
S i n c e space A space a n d space B space a r e space e n d s space o f space t h e space d i a m e t e r space a n d t h e space p o l e space h a s space t o space e r e c t e d space a t space a p o i n t space P space o n space t h e space b o u n d a r y comma angle A P B space equals space 90 to the power of o H e n c e comma space P A squared plus P B squared equals A B squared rightwards double arrow P A squared plus P B squared equals 13 squared.... left parenthesis 1 right parenthesis G i v e n space t h a t space P A minus P B equals space 7.... left parenthesis 2 right parenthesis S q u a r i n g space left parenthesis 2 right parenthesis comma space w e space g e t open parentheses P A minus P B close parentheses squared equals 49 rightwards double arrow P A squared plus P B squared minus 2 P A. P B equals 49 rightwards double arrow 13 squared minus 2 P A. P B equals 49 space left parenthesis u sin g space left parenthesis 1 right parenthesis right parenthesis rightwards double arrow 2 P A. P B equals 13 squared minus 49.... left parenthesis 3 right parenthesis N o w space open parentheses P A plus P B close parentheses squared equals P A squared plus P B squared plus 2 P A. P B rightwards double arrow open parentheses P A plus P B close parentheses squared equals 13 squared plus 13 squared minus 49 rightwards double arrow open parentheses P A plus P B close parentheses squared equals 289 rightwards double arrow P A plus P B equals 17.... left parenthesis 4 right parenthesis A d d i n g space left parenthesis 2 right parenthesis space a n d space left parenthesis 4 right parenthesis comma space w e space g e t space 2 P A equals 24 rightwards double arrow P A equals 12 H e n c e comma space P B equals 5 H e n c e comma space t h e space d i s tan c e space o f space t h e space t w o space g a t e s space f r o m space t h e space p o l e space a r e space 12 space a n d space 5.
Answered by satyajit samal | 10 Nov, 2015, 12:46: PM

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CBSE 10 - Maths
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