Binomial Expansion

a.

Show that the first three terms, in descending powers of $x$ , of the expansion of

3x - 2)^8

are given by

6561x^8 + ax^7 + bx^6

where $a$ and $b$ are integers to be found.

[3]

b.

Find the constant term in the expansion of

\left(3x - \frac{2}{x}\right)^8

[3]

a.

Show that the first three terms, in descending powers of $x$ , of the expansion of

3x - 2)^8

are given by

6561x^8 + ax^7 + bx^6

where $a$ and $b$ are integers to be found.

[3]

b.

Find the constant term in the expansion of

\left(3x - \frac{2}{x}\right)^8

[3]

Binomial Expansion Questions