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What is the 20^("th") term of the seque...

What is the `20^("th")` term of the sequence defined by
`a_n=(n-1) (2-n) (3+n) ?`

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OSWAAL PUBLICATION-SAMPLE PAPER 2-EXERCISE
  1. Write the multiplicative inverse of sqrt (3)/2-1/2i.

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  2. Is 3! + 4! = 7!?

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  3. What is the 20^("th") term of the sequence defined by an=(n-1) (2-n...

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  4. Find the slope of the line 3x-4y+10=0.

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  5. Find the derivative of x at x = 1.

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  6. Write the negation of the statement. ''intersection of two disjoint s...

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  7. A die is rolled.Describe the event "a number less than 7" occurs.

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  8. Let A and B be two sets such that n(A)=3 and n(B)=2,If (5,a),(6,b),(7,...

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  9. If A={2,5,7,9,11},B={7,9,11,13} and C={11,13,15},then find A nn (B uu ...

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  10. If X and Y are two sets such that X ∪ Y has 18 elements, X has 8 eleme...

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  11. Find the value of sin((31pi)/(3)).

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  12. Prove that: cos3x=4cos^(3)x-3cosx

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  13. Show that (-1,2,1),(1,-2,5),(4,-7,8) and(2,-3,4) are the vertices of p...

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  14. Express ((3+sqrt2i)(3-sqrt2 i))/((5-2i)-(5+2i)) in the form of a+ib.

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  15. The marks obtained by a student of Class XI in first and second termin...

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  16. Find the equation of the line, which makes intercepts -3 and 2 on X an...

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  17. Find the equation of the line passing through (-3, 5) and perpendicula...

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  18. Evaluate:underset( x rarr 0)lim (ax+xcos x)/(b sin x).

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  19. Write the contrapositive and converse of "If a paralleogram is a squar...

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  20. Two series A and B with equal means standard deviation 9 and 10 respe...

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