If a3 + b3 + c3 – 3abc = 0 then, which one is correct?
1). a = b - c
2). a + b + c = 0
3). a + c = b
4). a = b + c
We know that,
if a + b + c = 0
then, a3 + b3 + c3 = 3abc.1. If x= $8+2\sqrt{15}$ then what is the value of $\sqrt{x} +\frac{1}{\sqrt{x}}$ ?
3. The sum and the difference of two numbers is 120 and 10 respectively. Find the sum of their squares.
4. If 7x + 2 ≥ x - 2 and 7 + 2x ≥ 3 + 3x; then x can take which of the following values?
5. Given, 6x + 2(6 - x) > 2x - 2 < 5x/2 - 3x/4, then x can take which of the following values?
10. What value will come in place of the question mark (?) in the following questions.