Question

if 15C(2r-1)=15C(2r+4) find r​

Answer 1

Answer:

the equation is wrong as :

Solving LHS

15c(2r-1)

30cr - 15c

Solving RHS

15c(2r+4)

30cr + 60c

equating RHS and LHS

30cr - 15c = 30cr + 60c

30cr - 30cr = 60c + 15c

0 = 75c

0 = c

Putting c=0 in the equation given in question,

15(0)(2r - 1) = 15(0)(2r + 4)

0 = 0

Answer 2

find the value of if 15C(2r-1)=15C(2r+4) find r