If the ratio of the coefficient of third and fourth term in the expansion of (x - 1/2x )ⁿ is 1 : 2 , then the value of n will be

The number of terms in the expansion (a + b + c)ⁿ will be

If nN ,then x^2n-1+y^2n-1 is divisible by

The number of terms in the expansion of (1 + 6x + 9x²)²³ is

6th term in expansion of  is 

The value of (1.002)¹² upto fourth place of decimal is

Tenth term of the expansion (2x - y)⁷¹ is

The number of terms in the expansion of (3 + 2√5)¹⁸ - (3 - 2√5)¹⁸ is 

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

In the expansion of      , the term containing x⁴ is