Please tell me the mistake in my answer to the following question as the answer is r=4
the Tr+1 should be 15Cr (x4)15-r . (- 1/x3)r .
The mistake that you have done is that is that you have swapped the exponents of the terms in the general term, going by the above equation shoul d give you the answer.
The mistake that you have done is that is that you have swapped the exponents of the terms in the general term, going by the above equation shoul d give you the answer.