The value of (0.99)15 is
0.8432
0.8601
0.8502
None of these
The sum of the coefficient in the expansion of (1+x - 3x2)2163 will be
0
1
-1
22163
If p and q be positive , then the coefficient of xp and xq 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
Tenth term of the expansion (2x - y)71 is
-220 x2 y9
220 x2 y9
220 x2 y10
-220 x3 y9
If the coefficients of x2 and x3 in the expansion of (3 + ax)9 be same, then the value of a is
3/7
7/3
7/9
9/7
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
In the expansion of , the term containing x4 is
70 x4
60 x4
56 x4
In the expansion of , the coefficient of x-10 will be
12 a11
12 b11
12 a11 b
12 a11 b11
If the coefficient of 7th and 13th term in the expansion of (1 + x ) n are equal , then n is equal to.
10
15
18
20
If nN ,then x2n-1+y2n-1 is divisible by
x+y
x-y
x2+y2
x2+xy