Find the value of `.^12 C_2`

Find the value of .^10 C_2

Find the value of .^9 C_2

Find the value of .^5 C_2

Find the value of .^20 C_0-(.^20C_1)/2+(.^20C_2)/3-(.^20C_3)/4+...

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) .

Find the value of 4C_1 - 2C_2

Find the value of 11^2+12^2+13^2++20^2dot

If the matrix A = [(1,2),(3,4)] satisfies the equation A^(2) = 5A + 2I . Then, find the value of A^-1 .

Find the value of cos^2 48^@-sin^2 12^@

Find the value of 5C_3 + 4C_2