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