Question

if 2nc4=2ncr+2 find the value of r

Answer 1

Answer:

2nc4=2ncr+2

common 2

nc2=ncr+1

nc2-ncr=1

nc common

2-r=nc

r=nc-2

Answer 2

Answer:

2

2nc 4= 2nc r+2 ( 2nc common)

4 = r+2

4-2= r

2 =r