gulledomar23 gulledomar23
  • 09-08-2021
  • Mathematics
contestada

Find the coefficient of the x4y2
term in the expansion of
(3x - y)
[ ? ]xy?



URGENT! Picture included

Find the coefficient of the x4y2 term in the expansion of 3x y xy URGENT Picture included class=

Respuesta :

caylus
caylus caylus
  • 09-08-2021

Answer:

Hello

answer 1215

Step-by-step explanation:

As exponent of y is even sign is positive

Let's make the Pascal's triangle

[tex]\begin{array}{c|ccccccc}degree&x^6&x^5y&x^4y^2&x^3y^3&x^2^y^4&xy^5&y^6\\1&1&1\\2&1&2&1\\3&1&3&3&1\\4&1&4&6&4&1\\5&1&5&10&10&5&1\\6&1&6&15&20&15&6&1\\\end{array}\\\\answer\ 3^4* 15=1215[/tex]

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