Multiple Choice QuestionsIf the letters of word SACHIN are arranged in all possible ways and these words are written out as in dictionary, then the word SACHIN appears at serial number
601
600
602
602
If A =Â 
 and I = 
 , then which one of the following holds for all n ≥ 1, by the principle of mathematical induction
An = nA – (n – 1)I
An = 2n-1A – (n – 1)I
An = nA + (n – 1)I
An = nA + (n – 1)I
If the coefficient of x7Â 
in equals the coefficient of x-7 in
then a and b satisfy the relation
a – b = 1
a + b = 1
a/b =1
a/b =1
If z1 and z2 are two non-zero complex numbers such that |z1 + z2| = |z1| + |z2| then argz1 – argz2 is equal to
Ï€/2
-Ï€
0
0
If x is so small that x3 and higher powers of x may be neglected, then 
may be approximated as
If 
 where a, b, c are in A.P. and |a| < 1, |b|<1, |c|< 1, then x, y, z are in
G.P.
A.P.
Arithmetic − Geometric Progression
Arithmetic − Geometric Progression
In a triangle, ABC, let ∠C = π/2 . If r is the in radius and R is the circumradius of the triangle ABC, then 2 (r + R) equals
b + c
a+b
a + b + c
a + b + c
 equal to
Switch
