Thread: Please find coefficient

1. Please find coefficient

Please find coefficient of $x^4$ in the expansion of $(2x+y)^8$
${8\choose4}(2x)^4y^4=70*16x^4y^4= 1120x^4y^4$

The answer the coefficient is 1120

Will you please check it and correct if it's wrong.

Thank you

2. Originally Posted by oceanmd
Please find coefficient of $x^4$ in the expansion of $(2x+y)^8$
${8\choose4}(2x)^4y^4=70*16x^4y^4= 1120x^4y^4$

The answer the coefficient is 1120

Will you please check it and correct if it's wrong.

Thank you
you mean the coefficient of the x^4-term. yes, it's ok