Find the value of `.^9 C_6`

Find the value of .^9 C_3

Find the value of .^9 C_2

Find the value of .^6 C_3

Find the value of .^9P_4

Find the values of .^(9)C_(7)

Find the value of .^(20)C_(0) xx .^(13)C_(10) - .^(20)C_(1) xx .^(12)C_(9) + .^(20)C_(2) xx .^(11)C_(8) - "……" + .^(20)C_(10) .

underset(x to -a)"Lt" (x^9+a^9)/(x+a) = 9 , then find the value of a.

If 1/( ^5C_r)+1/( ^6C_r)+1/(~^4C_r) find the value of r.

If |{:(10_(c_(4)),10_(c_(5)),11_(c_(m))),(11_(c_(6)),11_(c_(7)),12_(c_(m+2))),(12_(c_(8)),12_(c_(9)),13_(c_(m+4))):}|=0 then find the value of m .

If (c-3)^2 = c^2 + kc + 9 , Let's find the value of k