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If Delta=|(a,b,c),(d,e,f),(g,h,i)| then...

If `Delta=|(a,b,c),(d,e,f),(g,h,i)|` then what is
`|(3d+5g ,4a+7g,6g),(3e+5h,4b+7h,6h),(3f+5i,4c+7i,6i)|` equal to ?

A

`Delta`

B

`7Delta`

C

`72Delta`

D

`-72Delta`

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NDA PREVIOUS YEARS-QUESTION PAPER 2021(I)-MULTIPLE CHOICE QUESTION
  1. If a(n) = n(n!) , then what is a1 +a2 +a3 +......+ a(10) equal to ?

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  2. If p and q are the non-zero roots of the equation x^2 + px + q = 0, t...

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  3. If Delta=|(a,b,c),(d,e,f),(g,h,i)| then what is |(3d+5g ,4a+7g,6g...

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  4. If (1)/(b+c),1/(c+a),1/(a+b) are are in HP, then which of the followin...

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  5. If A=[(1,a),(0,1)] where a in N , then what is A^(100) - A^(50)-2A^(2...

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  6. If |(a,-b,a-b-c),(-a,b,-a+b-c),(-a,-b,-a-b+c)| - kabc = 0 (a != 0, b !...

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  7. What is sum(r = 1)^(8n + 7)i^(r) equal to where i = sqrt(-1) ?

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  8. If z = x + iy where i = sqrt(-1) , then what does the equation zbarz ...

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  9. Which one of the following is a square root of 2a+2sqrt(a^2+b^2) , w...

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  10. If sintheta and costheta are the roots of the equationax^(2)-bx+c=0 ,...

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  11. If C (n, 4), C (n, 5) and C (n, 6) are in AP, then what is the value ...

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  12. How many 4-letter words (with or without meaning) containing two vowe...

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  13. Suppose 20 distinct points are placed randomly on a circle. Which of t...

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  14. How many terms are there in the expansion of ((a^2)/(b^2) + (b^2)/(a^2...

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  15. For what values of k is the system of equations 2k^2x + 3y - 1 = 0, ...

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  16. The inverse of a matrix A is given by [(-2,1),(3/2, -1/2)] What is A e...

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  17. What is the period of the function f(x) = ln (2 + sin^2 x)?

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  18. If sin(A + B) = 1 and 2 sin (A - B) = 1, where 0 lt A, B lt pi/2 then ...

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  19. Consider a regular polygon with 10 sides, What is the number of triang...

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  20. Consider all the real roots of the equation x^4 - 10x^2 + 9 = 0. What ...

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