- #1
vkash
- 318
- 1
find value of C0+(C0+C1)+(C0+C1+C2)+(C0+C1+C2+C3)...
Cr represent nCr
find the value of C0+(C0+C1)+(C0+C1+C2)+(C0+C1+C2+C3)...(C0+C1+C2+C3+...Cn)
How i did it
C0+C1+C2+...Cn=(1+1)n
so
C0=(1+1)0
C0+C1=(1+1)1 ( here n is 1)
C0+C1+C2=(1+1)2 (here n is 2)
.
.
.
so the required question is changed into following
20+21+22+23+...+2n
that's Geometric progression
so it should equal to 2n-1
where i have done it wrong
Cr represent nCr
find the value of C0+(C0+C1)+(C0+C1+C2)+(C0+C1+C2+C3)...(C0+C1+C2+C3+...Cn)
How i did it
C0+C1+C2+...Cn=(1+1)n
so
C0=(1+1)0
C0+C1=(1+1)1 ( here n is 1)
C0+C1+C2=(1+1)2 (here n is 2)
.
.
.
so the required question is changed into following
20+21+22+23+...+2n
that's Geometric progression
so it should equal to 2n-1
where i have done it wrong