`1^(2)+2^(2)+3^(2)+….+19^(2)=_____.`

How many core electrons are presentin ._(19)K ? Hint : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(1)

How many core electrons are presentin ._(19)K ? Hint : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(1)

How many core electrons are presentin ._(19)K ? Hint : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(1)

The coefficient of x^(19) in the polynomial (x-1)(x-2)(x-2^2)(x-2^(19)) is 2^(20)-2^(19) b. 1-2^(20) c. 2^(20) d. none of these

The coefficient of x^(19) in the polynomial (x-1)(x-2)(x-2^2).......(x-2^(19)) is 2^(20)-2^(19) b. 1-2^(20) c. 2^(20) d. none of these

The coefficient of x^(19) in the polynomial (x-1)(x-2)(x-2^2)(x-2^(19)) is 2^(20)-2^(19) b. 1-2^(20) c. 2^(20) d. none of these

9 2/3+ () =19

Which of the following expressions are polynomials and which are not? 5x^(2)y^(1/2)-3xy^(3)+19x^(2)y^(3)

The coefficient of x^(19) in the polynomial (x-1)(x-2)(x-2^(2))...(x-2^(19)) is 2^(20)-2^(19) b.1-2^(20) c.2^(20) d.none of these