+0  
 
-1
25
1
avatar

The third, fourth, and fifth terms in the expansion of (x + a)^n are 84, 280, and 560, respectively. Find n. 

 Jan 24, 2019

Best Answer 

 #1
avatar
0

When x=2, then:

(2 + a)^7 =x^7 + 14 x^6 + 84 x^5 + 280 x^4 + 560 x^3 + 672 x^2 + 448 x + 128

 Jan 24, 2019
 #1
avatar
0
Best Answer

When x=2, then:

(2 + a)^7 =x^7 + 14 x^6 + 84 x^5 + 280 x^4 + 560 x^3 + 672 x^2 + 448 x + 128

Guest Jan 24, 2019

32 Online Users

avatar
avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.