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OpenStudy (anonymous):
PLEASE HELP!? What is the fourth term in the expansion of (x - 4)6?
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OpenStudy (anonymous):
answer choices: -1280x^3 -256x^4 256x^4 1280x^3
OpenStudy (anonymous):
it must have x^3 since the exponents for x in the binomial expansion r x^6 , x^5 , x^4 , x^3 it also must have signus (-) since the signs goes in this way + , - , +, -
OpenStudy (anonymous):
I am beyond lost now.
zepdrix (zepdrix):
|dw:1373563084865:dw|See how the powers on x decrease as we move to the right, and the powers on our -4 increase?
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