Maths-
General
Easy
Question
If the sum of the coefficients in the expansion of 
is equal to square of the sum of the coefficients in the expansion of 
are positive constants, then
- r,p and q are in G.P.
- 1/r, 1/p an 1/q are in H.P.
The correct answer is:
Sum of co–efficient of 
Square of the sum of co–efficient of 
£ A.M. of r and q = (r + q)/2.
Related Questions to study
maths-
If 
is equal to
If is equal to
maths-General
chemistry-
Statement-1 : Silicones are resistant to heat, oxidation and most chemicals
Statement-2 : The silicones(a) have stable silica-like six electron owing to high bond energy of Si – O bond and (b) have high strength of Si – C
Statement-1 : Silicones are resistant to heat, oxidation and most chemicals
Statement-2 : The silicones(a) have stable silica-like six electron owing to high bond energy of Si – O bond and (b) have high strength of Si – C
chemistry-General
chemistry-
Statement-1 : Boron forms only covalent compounds
Statement-2 : Due to small size of boron, the sum of its first three ionisation enthalpies very high
Statement-1 : Boron forms only covalent compounds
Statement-2 : Due to small size of boron, the sum of its first three ionisation enthalpies very high
chemistry-General
chemistry-
chemistry-General
chemistry-
ConcH2SO4 cannot be used to prepare HBr from NaBr because it –
ConcH2SO4 cannot be used to prepare HBr from NaBr because it –
chemistry-General
chemistry-
Three allotropes (A), (B) and (C) of phosphorous in the following change are respectively 
Three allotropes (A), (B) and (C) of phosphorous in the following change are respectively
chemistry-General
chemistry-
The molecular shapes of diborane is shown: Consider the following statements for diborane 
1) Boron is approximately sp3 hybridised
2) B-H-B angle is 180°
3) There are two terminal B-H bonds for each boron atom
4) There are only 12 bonding electrons available Of these statements –
The molecular shapes of diborane is shown: Consider the following statements for diborane
1) Boron is approximately sp3 hybridised
2) B-H-B angle is 180°
3) There are two terminal B-H bonds for each boron atom
4) There are only 12 bonding electrons available Of these statements –
chemistry-General
chemistry-
Which two of the following salts are used for preparing iodized salt–
i) KIO3
ii) KI
iii) I2
iv) HI
Which two of the following salts are used for preparing iodized salt–
i) KIO3
ii) KI
iii) I2
iv) HI
chemistry-General
chemistry-
Which one of the following oxy acid of fluorine exists ?
Which one of the following oxy acid of fluorine exists ?
chemistry-General
chemistry-
Thermite is a mixture of –
Thermite is a mixture of –
chemistry-General
chemistry-
Which of the following represents the correct order of increasing pKa values of the given acids –
Which of the following represents the correct order of increasing pKa values of the given acids –
chemistry-General
chemistry-
Producer gas is a mixture of –
Producer gas is a mixture of –
chemistry-General
physics-
Two points of a rigid body are moving as shown. The angular velocity of the body is
Two points of a rigid body are moving as shown. The angular velocity of the body is
physics-General
physics-
A hinged construction consists of three rhombs with the ratio of sides 5:3:2. Vertex A3 moves in the horizontal direction at a velocity v. Velocity of A2 is
A hinged construction consists of three rhombs with the ratio of sides 5:3:2. Vertex A3 moves in the horizontal direction at a velocity v. Velocity of A2 is
physics-General
physics-
A particle starts from the point (0m, 8m) and moves with uniform velocity of 
. After 5 seconds, the angular velocity of the particle about the origin will be :
A particle starts from the point (0m, 8m) and moves with uniform velocity of . After 5 seconds, the angular velocity of the particle about the origin will be :
physics-General
