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If the coefficients of {x}^{{3}}and {x}^{{4}}in the expansion

Question

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

(16, \frac{251}{3})

(3)

(14, \frac{251}{3})

(3)

(14, \frac{251}{3})

(2)

(14, \frac{251}{3})

(2)

(14, \frac{272}{3})

(16, \frac{272}{3})

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Noah Discussed

If the coefficients of

x^{3}

and

x^{4}

in the expansion of

(1 + a x + b x^{2}) (1 - 2 x)^{18}

in powers of x are both zero, then (a, b) is equal to

14 mins ago

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Question Text	If the coefficients of $x^{3}$ and $x^{4}$ in the expansion of $(1 + a x + b x^{2}) (1 - 2 x)^{18}$ in powers of x are both zero, then (a, b) is equal to
Answer Type	Video solution: 1
Upvotes	151