[" If the coefficients of "x^(3)" and "x^(4)" in the expansion of "(1+ax+bx^(2))(1-2x)^(18)" in powers of "x" are "],[" both zero,then "(a,b)" is equal to : "]

If the coefficient of x^(3) and x^(4) in the expansion of (1+ax+bx^(2)) (1-2x)^(18) in power of x are both zero, then (a,b) is equal to

If the coefficents of x^(3) and x^(4) in the expansion of (1+ax + bx^(2)) (1-2x)^(18) in powers of x and both zero then (a,b) is equal to

If the cofficients of x^(3)andx^(4) in the expansion of (1+ax+bx^(2))(1-2x)^(18) in powers pf x are both zero , the (a , b) is equal to -

If the coefficients of x^3 and x^4 in the expansion of (1""+a x+b x^2)""(1-2x)^(18) in powers of x are both zero, then (a, b) is equal to (1) (16 ,(251)/3) (3) (14 ,(251)/3) (2) (14 ,(272)/3) (4) (16 ,(272)/3)

If the coefficients of x^3 and x^4 in the expansion of (1""+a x+b x^2)""(1-2x)^(18) in powers of x are both zero, then (a, b) is equal to (1) (16 ,(251)/3) (3) (14 ,(251)/3) (2) (14 ,(272)/3) (4) (16 ,(272)/3)

If the coefficients of x^3 and x^4 in the expansion of (1""+a x+b x^2)""(1-2x)^(18) in powers of x are both zero, then (a, b) is equal to (1) (16 ,(251)/3) (3) (14 ,(251)/3) (2) (14 ,(272)/3) (4) (16 ,(272)/3)

If the coefficients of x^3 and x^4 in the expansion of (1""+a x+b x^2)""(1-2x)^(18) in powers of x are both zero, then (a, b) is equal to (1) (16 ,(251)/3) (3) (14 ,(251)/3) (2) (14 ,(272)/3) (4) (16 ,(272)/3)

If the coefficients of x^3 and x^4 in the expansion of (1+ax+bx^3)(1-2x)^18 in powers of x are both zero, then (a,b) is equal to