Question

In the expansion of (4x-2y)^7, one of the terms contains y^4. determine the exponent of x in this term

Answer 1

Place the first term "4x" with descending exponets from left to right beginning with 1 and ending with 1 
 Place the second term "-2y" with descending exponets from right to left beginning with 1 and ending with 1.
  Attached solution and triangle of pascal. The answer is the exponent of x in the term y^4 is 3. 

Answer 2

Answer:

3

Step-by-step explanation: