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If x,y,z are nonzero real number , then ...

If x,y,z are nonzero real number , then the inverse of matrix `A= {:[( x,0,0),( 0,y,0) ,( 0,0,z) ]:}` is

A

`{:[(x^(-1), 0,0),( 0,y^(-1) , 0),( 0,0,z^(-1))]:} `

B

`xyz {:[( x^(-1) ,0,0),( 0,y^(-1) ,0),( 0,0,z^(-1)) ]:}`

C

`(1)/(xyz) {:[( x ,0,0),( 0,y ,0),( 0,0,z) ]:}`

D

`(1)/(xyz) {:[( 1 ,0,0),( 0,1 ,0),( 0,0,1) ]:}`

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A
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NCERT TELUGU-DETERMINANTS -Miscellaneous Exercises on Chapter 4
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  2. Without expanding the determinant, prove that {:[( a, a ^(2), bc ),( ...

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  3. Evaluate {:[( cos alpha cos beta , cos alpha sin beta , -sin alpha ),...

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  4. If a,b and c are real numbers, and Delta ={:[( b+c,C+a,a+b),( c+a,a...

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  5. Solve the equation {:[( x+a,x,x),(x,x+a,x),(x,x,x+a) ]:}=0,ane 0

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  6. Prove that {:[( a^(2) , bc, ac+c^(2)),( a^(2) +ab,b^(2) ,ac),( ab,b^(2...

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  7. If A^(-1) ={:[( 3,-1,1),(-15,6,-5),(5,-2,2) ]:}and B= {:[( 1,2,-2),( -...

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  8. Evaluate {:[( x,y , x+y),( y,x+y,x),( x+y,x,y)]:}

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  9. Evaluate {:[(1,x,y),( 1,x+y,y),( 1,x,x+y)]:}

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  10. Using properties of determinants in Exercises prove that : {:[( alph...

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  11. {:[( x,x^(2) , 1+ px^(3) ),( y,y^(2) , 1+ py^(3)),( z,z^(2) , 1+pz^(3)...

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  12. Prove {:[( 3a,-a+b,-a+c),( -b+a, 3b,-b+c) ,( -c+a,-c+b,3c) ]:} = 3( a+...

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  13. {:[( 1,1+p,1+p+q),( 2,3+2p,1+3p+2q),( 3,6+3p,1+6p+3q)]:}=1

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  14. Prove that {:[( sin alpha , cos alpha ,cos (alpha +delta) ),( sinbeta,...

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  15. If a,b,c are in A.P. then the determinant {:[( x+2,x+3,x+2a),( x+3,...

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  16. If x,y,z are nonzero real number , then the inverse of matrix A= {:[( ...

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  17. Let A={:[( 1,sin theta , 1),( -sin theta , 1, sin theta ),( -1 ,-sin ...

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