G10 Math Ch1-Ch-5

(i) If a, /3 are the roots of 3x^2 + Sx - 2 = 0, then a+ /3 is:

• (a) ¾
• (b) -¾
• (c) -i

(ii) If a, /J are the roots of 7x^2 -x + 4 = 0, then a/J is:

• (a) l
• (b) -1
• (c) i

(iii) Roots of the equation 4x^2 - Sx + 2 = 0 are:

• (a) irrational
• (b) imaginary
• (c) rational

(iv) Cube roots of -1 are:

• (a) -1, -co, -CO2
• (b) -1, CO, -CO2
• (c) -1, -co, co2
• (d) 1, -co, -CO2

(v) Sum of the cube roots of unity is:

• (a) 0
• (b) 1
• (c) -1
• (d) 3

(vi) Product of cube roots of unity is:

• (a) 0
• (b) 1
• (c) -1
• (d) 3

(vii) If b^2 - 4ac < 0, then the roots of ax^2 +bx+ c = 0 are:

• (a) irrational
• (b) rational
• (c) imaginary
• (d) none of these

(viii) If b^2 - 4ac > 0, but not a perfect square then roots of ax^2 + bx+ c = 0 are:

• (a) imaginary
• (b) rational
• (c) irrational
• (d) none of these

(ix) 1x + 7J is equal to:

• (a) 1/(a+ /J)
• (b) (a+ /J)/1
• (c) (a- /J)/1
• (d) (a/1)+ (/J/1)

(x) a^2 + /3^2 is equal to:

• (a) a^2 - p^2
• (b) 1
• (c) (a+ /J)^2 - 2a/J
• (d) a+ /J