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Theory of Equations 2 Mark Creative Question Paper With Answer Key

12th Standard

    Reg.No. :
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Maths

Time : 00:30:00 Hrs
Total Marks : 22

    2 Marks

    11 x 2 = 22
  1. Formulate into a mathematical problem to find a number such that when its cube root is added to it, the result is 6.

  2. Construct a cubic equation with roots 2, −2, and 4.

  3. If sin ∝, cos ∝ are the roots of the equation ax2 + bx + c-0 (c ≠ 0), then prove that (n + c)2 - b2 + c2

  4. Find value of a for which the sum of the squares of the equation x2 - (a- 2) x - a -1 = 0 assumes the least value.

  5. Find the Interval for a for which 3x2+2(a2+1) x+(a2-3a+2) possesses roots of opposite sign.

  6. Find x If \(x=\sqrt { 2+\sqrt { 2+\sqrt { 2+....+upto\infty } } } \)

  7. Find the number of positive and negative roots of the equation x7 - 6x6 + 7x5 + 5x2+2x+2

  8. Find a polynomial equation of the lowest degree with rational co-efficients having \(\sqrt 3\) and 1 - 2i as two of its roots.

  9. If the roots of the equation \(x^{3}+\mathrm{p} x^{2}+\mathrm{q} x+\mathrm{r}=0\) are in arithmetic progression, show that 2p3- 9 pq + 27r = 0

  10. Form an equation whose roots are three times those of the equation \(x^{3}-x^{2}+x+1=0\)

  11. Form an equation whose roots are the reciprocals of the roots of \(x^{4}-5 x^{3}+7 x^{2}-4 x+5=0\)

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