Maths-
General
Easy
Question
Statement-1 : f(x) = cos2x + cos3 
– cos x cos3 Then f‘(x) = 0
Statement-2 : Derivative of constant function is zero
- If both (A) and (R) are true, and (R) is the correct explanation of (A).
- If both (A) and (R) are true but (R) is not the correct explanation of (A).
- If (A) is true but (R) is false.
- If (A) is false but (R) is true.
The correct answer is: If both (A) and (R) are true but (R) is not the correct explanation of (A).
Related Questions to study
Maths-
Let f and g be real valued functions defined on interval (–1, 1) such that 
(x)sin x
Statement-1 : 
[g(x) cot x –g(0) cosec x] =
(0)
Statement-2 : 
(0) = g (0)
Let f and g be real valued functions defined on interval (–1, 1) such that (x)sin x
Statement-1 : [g(x) cot x –g(0) cosec x] = (0)
Statement-2 : (0) = g (0)
Maths-General
Maths-
Statement-1 : If f(x) =
(x 
0) and f(0) = 9 is continuous at x = 0 then k = ± 6.
Statement-2 : For continuous function f(x) = f(0)
Statement-1 : If f(x) = (x 0) and f(0) = 9 is continuous at x = 0 then k = ± 6.
Statement-2 : For continuous function f(x) = f(0)
Maths-General
Maths-
Statement-I : Let f(x) = 
, x 
, x
. If f(x) is continuous in , Then f 
= 
.
Statement-II : f(x) is continuous at x = a if
f(x) = f(a)
Statement-I : Let f(x) = , x , x. If f(x) is continuous in , Then f = .
Statement-II : f(x) is continuous at x = a if f(x) = f(a)
Maths-General
Maths-
Statement 1 : f(x) = xn sin 
is differentiable for all real values of x (n 
2).
Statement 2 : For n 2, Right derivative = left derivative (for all real values of x).
Statement 1 : f(x) = xn sin is differentiable for all real values of x (n 2).
Statement 2 : For n 2, Right derivative = left derivative (for all real values of x).
Maths-General
Chemistry-
If H2O2 is mixed with Fe2+, which reaction is more likely:
If H2O2 is mixed with Fe2+, which reaction is more likely:
Chemistry-General
Chemistry-
For the following cell reaction 
, 
Hence, Ecell is:
For the following cell reaction , Hence, Ecell is:
Chemistry-General
Chemistry-
Extraction of zinc from zinc blende is achieved by-
Extraction of zinc from zinc blende is achieved by-
Chemistry-General
Chemistry-
When the sample of Cu with Zn impurity is to be purified by electrolysis, the appropriate electrodes are-
CathodeAnode
When the sample of Cu with Zn impurity is to be purified by electrolysis, the appropriate electrodes are-
CathodeAnode
Chemistry-General
Chemistry-
Which statement is not correct for Kohlrausch law?
Which statement is not correct for Kohlrausch law?
Chemistry-General
Chemistry-
The equivalent conductivity of 0.1 M weak acid is 100 times less than that at infinite dilution. The degree of dissociation of weak electrolyte at 0.1 M is –
The equivalent conductivity of 0.1 M weak acid is 100 times less than that at infinite dilution. The degree of dissociation of weak electrolyte at 0.1 M is –
Chemistry-General
Chemistry-
3 faraday of electricity are passed through molten Al2O3, aqueous solution of CuSO4 and molten NaCl taken in three different electrolytic cells. The amount of Al, Cu and Na deposited at the cathodes will be in the ratio of –
3 faraday of electricity are passed through molten Al2O3, aqueous solution of CuSO4 and molten NaCl taken in three different electrolytic cells. The amount of Al, Cu and Na deposited at the cathodes will be in the ratio of –
Chemistry-General
Chemistry-
Beryllium is placed above magnesium in the II group. Beryllium dust, therefore, when added to MgCl2 solution will –
Beryllium is placed above magnesium in the II group. Beryllium dust, therefore, when added to MgCl2 solution will –
Chemistry-General
Chemistry-
Metals can be prevented from rusting by –
Metals can be prevented from rusting by –
Chemistry-General
Chemistry-
The thermodynamic efficiency of cell is given by –
The thermodynamic efficiency of cell is given by –
Chemistry-General
Chemistry-
The following facts are available 
Which of the following is correct?
The following facts are available Which of the following is correct?
Chemistry-General
