The value of (0.99)^{15} is
0.8432
0.8601
0.8502
None of these
If in the expansion of (1 + x )^{n} , the coefficient of r^{th} and (r + 2)^{th} term be equal , then r is equal to
2n
n/2
If the 4^{th} term in the expansion of is independent of x , then n is equal to
5
6
9
The value of the expression x^{5} + 10 x^{4}a + 40 x^{3} a^{2} + 80 x^{2}a^{3} + 80 x a^{4} + 3^{2} a^{5} is
(x + a)^{5}
(3n + a)^{5}
(x + 2a)^{5}
(x + 2a)^{3}
Cuberoot of 217 is
6.01
6.04
6.02
If the coefficient of 7^{th} and 13^{th} term in the expansion of (1 + x ) ^{n} are equal , then n is equal to.
10
15
18
20
If p and q be positive , then the coefficient of x^{p} and x^{q} in the expansion of ( 1 + x ) ^{p+q} will be
Equal
Equal in magnitude but opposite in sign
Reciprocal to each other
None of the above
If n∈N ,then x^{2n-1}+y^{2n-1} is divisible by
x+y
x-y
x^{2}+y^{2}
x^{2}+xy
The number of terms in the expansion (a + b + c)^{n} will be
n + 1
n + 3
The number of terms in the expansion of (3 + 2√5)^{18} - (3 - 2√5)^{18} is
11 terms
10 terms
9 terms
8 terms