Register
What is the fifth term in the expansion of (3x - 3y)7? __ x3y4
8.3k views
4 votes
What is the fifth term in the expansion of (3x - 3y)7?
__ x3y4

User Warunapww
by
8.5k points

2 Answers

2 votes

Answer:

76545

Explanation:

got it write on edge :)

User Haresh Vidja
by
8.8k points
5 votes
(r+1)th term of (a +x)^n = nCr a^(n-r)x^r

so 5th term of (3x - 3y)^7 = 7C4 * (3x)^(7-4) (-3y)^4 (NOTE r = 4)

= 35 * 27x^3 * 81y^4

= 76545 x^4y^3
User Krl
by
8.2k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers

Other Questions

How do you can you solve this problem 37 + y = 87; y =
How do you estimate of 4 5/8 X 1/3
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement  how thick must the cement be to cover field
A dealer sells a certain type of chair and a table for $40. He also sells the same sort of table and a desk for $83 or a chair and a desk for $77. Find the price of a chair, table, and of a desk.
Link Copied!