If a 2 + b 2 + 4c 2 = 2(a + b – 2c) – 3 and a, b, c are real, then the value of (a 2 + b 2 + c 2) is
Find the simlest value of 2√50+√18-√72 (given √2 = 1414).
If 4x-3/x+4y-3/y+4z-3/z = 0
then the value of 1/x + 1/y + 1/z is
If x2 – 3x + 1 = 0, then value of
x2 + x + 1/x+1/x2 is
The simple interest on Rs. 4000 in 3 yr at the rate of x% per annum equals to the simple interest on Rs. 5000 at the rate of 12% per annum in 2 yr. The value of x is
A certain distance is covered at a certain speed. If half of this distance is covered in double the time, the ratio of the two speeds is