Question

write the coefficient from x3-1​

Answer 1

Step-by-step explanation:

The coefficient of x³ is 1.

Answer 2

Answer:

the coefficient of x3-1 is

Step-by-step explanation:

1−x+x

2

)

5

General term:-

α

1

!α

2

!α

3

5!

1

α

1

(−1)

α

2

x

α

2

(x

2

)

α

3

=

α

1

!α

2

!α

3

!

5!

(−1)

α

2

x

α

2

+2α

3

For coefficient of x

3

α

2

+2α

3

=3

α

1

+α

2

+α

3

=5

α

3

=0,α

2

=3,α

1

=2

α

3

=1,α

2

=1,α

1

=3

∴ coefficient of x

3

=

2!3!0!

5!

(−1)

3

+

3!1!1!

5!

(−1)

1

=−

2

5×4

−5×4

=10−20

=−30.