[" Find a positive value of "m" for which the coefficient of "x^(2)" in the expansion "(1+x)^(m)" is "6" ."],[" Find "a,b" ,respectively."" expansion of "(a+b)^(n)" if the first three terms of the expansion are "729,7290" and "],[30375," respectively."],[" Find the value of "^(n)pi^(2)," if the ratio of the fifth term from the beginning to the fifth term from the end in the "],[" curmesion of "(root(4)(2)]