If (1+x−2x2)20=a0+a1x+a2x2+a3x3+…+a40x40, then find the value of a1+a3+a5+…+a39˙

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If {({1}+{x}-{2}{x}^{{2}})}^{{{20}}}={a}_{{0}}+{a}_{{1}}{x}+{a

Question

If $(1 + x - 2 x^{2})^{20} = a_{0} + a_{1} x + a_{2} x^{2} + a_{3} x^{3} + \dots + a_{40} x^{40},$ then find the value of $a_{1} + a_{3} + a_{5} + \dots + a_{39} ˙$

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(1 + x - 2 x^{2})^{20} = a_{0} + a_{1} x + a_{2} x^{2} + a_{3} x^{3} + \dots + a_{40} x^{40},

then find the value of

a_{1} + a_{3} + a_{5} + \dots + a_{39} ˙

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Question Text

(1 + x - 2 x^{2})^{20} = a_{0} + a_{1} x + a_{2} x^{2} + a_{3} x^{3} + \dots + a_{40} x^{40},

then find the value of

a_{1} + a_{3} + a_{5} + \dots + a_{39} ˙