The common terms of the series `1+2+4+8+…` and `1+4+7+10+…`upto 100 terms are n, then n is -

The number of terms common between the series 1+2+4+8... to 100 terms and 1+4+7+10+... to 100 terms is

The number of terms common between the series 1+ 2 + 4 + 8..... to 100 terms and 1 + 4 + 7 + 10 +... to 100 terms is

The number of terms common between the series 1+ 2 + 4 + 8..... to 100 terms and 1 + 4 + 7 + 10 +... to 100 terms is

The sum to n terms of the series 1/2 + 3/4 + 7/8 + 15/16 + ....... is

2.4 + 4.7 + 6.10+ …. upto (n-1) terms=

Find the sum of n terms of the series 1/2.5+1/5.8+1/8.11 …to n terms.