Asked by Alice
Find the fifth term in the expansion of (4-1/5x)^9 in ascending powers of x
Answers
Answered by
Reiny
You must know the binomial expansion and the general term of the expansion!!
5th term = C(9,4) (4^4)(-x/5)^5
= 126 (256)(-x^5)/3125
= -32256/3125 x^5
oops, just did in descending powers, so
C(9,5) 4^5 (-x/5)^4
= 126(1024)(x^4/625)
= 129024/625 x^4 , in ascending order
5th term = C(9,4) (4^4)(-x/5)^5
= 126 (256)(-x^5)/3125
= -32256/3125 x^5
oops, just did in descending powers, so
C(9,5) 4^5 (-x/5)^4
= 126(1024)(x^4/625)
= 129024/625 x^4 , in ascending order
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.