Question

Plz ans it... thankyou

Answer 1

Answer:

Given:

The expansion is,

(3x-1)⁷=a7x⁷+a6x⁶+a5x⁵+........+a1x¹+ao

To find:

a7+a6+a5+......+a1+a0

Solution:

In the expansion,

Put ,x=1

Then it becomes,

(3-1)⁷=a7+a6+a5+.........+a1+a0

a7+a6+a5+.......+a1+a0=2⁷=128

Step-by-step explanation:

Hope it helps you.......