help me Please

Binomial Theorem

Find the indicated term of the expansion.

4th term of (4x-y)^9

ManuelBautista2019
Jan 29, 2018

#1**+2 **

4th term of (4x-y)^9

The forth term from what end .. I never know what people want when they say this.

\(9C3(4x)^3(-y)^6 = 84*64x^3y^6=5376x^3y^6\) (Edited)

or

\(9C3(4x)^6(-y)^3=-84*4096x^6y^3=-344064x^6y^3 \) (Edited)

As Omi pointed out, I had mistakenly omitted the minus sign in front of the y.

I also made a mistake with the C value.

**Thanks Omi :)**

Omi you also made a small mistake as 28+56=84 NOT 54

Melody
Jan 29, 2018