If the 21st and 22nd terms in the expansin of `(1+x)^44` are equal then x is equal to` (A) 21/20` (B) `23/24` (C) `8/7` (D) `7/8`

The 21 st and 22 nd terms in the expansion of (1+x)^(44) are equal.Then x:

If th term in the expansion of (2x^(2)-(1)/(x))^(12) is without x then r is equal to a.7 b.8 c.9d .

If the coefficients of rth and (r+1) th terms in the expansion of (3+7x)^(29) are equal,then r equals a.15 b.21 c.14 d.none of these

If the coefficients of x^(7) and x^(8) in the expansion of [2+(x)/(3)]^(n) are equal,then the value of n is :(A)15(B)45(C)55(D)56

If ( x- 3 )/5 - 2 = -1 , then x is equal to ( a ) 8 ( b) 3 ( c ) -7 ( d ) 2

In the expansion of (1+x)^(n),7 th and 8th terms are equal.Find the value of (7/x+6)^(2)

If (x,3)+(2,5)=(7,8) then x is equal to a)2 b)5 c)7 d)9

If the middle term in the expansion of ((1)/(x)+x sinx)^(10) is equal to 7(7)/(8) , then the number of values of x in [0, 2pi] is equal to

If 5:a20:28, then a, is equal to 4 b.6 c.7 d.8