+0  
 
0
54
1
avatar+4 

3n+2 + (3n+3 - 3n+1) = ?

Choices are:

(A) 1/3n+1

(B) 1/3n+2

(C) 3/8

(D) 1/3

vivmd  Oct 27, 2018
edited by vivmd  Oct 27, 2018
 #1
avatar+27128 
+2

None of your choices provide the correct solution to what you have written!

 

3n+2 + 3n+3 - 3n+1 → 3n+1(31 + 32 - 30) → 3n+1(3 + 9 - 1) → 11*3n+1 

 

I think you must have meant  3n+2 / (3n+3 - 3n+1)  → 31 / (32 - 30) → 3 / (9 - 1) → 3/8   (where 3n+1 has been factored out of the terms in both numerator and denominator).

Alan  Oct 27, 2018

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