Question

X)
vii) Find the 4th term from the end in (2a +5b)8​

Answer 1

Answer:

4

th

term from the end in the expansion of (

2

x

3

−

x

2

2

)

7

=4

th

term from the end in the expansion of (−

x

2

2

+

2

x

3

)

7

=T

4

=T

3+1

=

7

C

3

(

x

2

−2

)

7−3

(

2

x

3

)

3

=

1.2.3

7.6.5

x

8

2

4

.

2

3

x

9

=70x