Find the number of terms in the progression `4, 2, 1, …,(1)/(128).`

No. of terms in the series 4,2,1,…,(1)/(128) is :

No. of terms in the series 4,2,1,…,(1)/(128) is :

Find the sum of 10 terms of the progression : 2+4+8+…

Find the sum of 10 terms of the progression : 2+4+8+…

Find the 15th term of the arithmetic progression 10, 4, -2, ….

Find the 9^(th) term and the general term of the progressions: 1/4, -1/2 , 1 , -2

Find the 10th term and the general term of the progression 1/4, (-1)/2, 1, -2, 4 , ...

Find the sum of the following geometric progression: 4,2,1,1/2,quad rarr10 terms.

Find the sum of the following geometric progression: 4,2,1,1//2, \ to\ 10\ terms.

Find the sum to indicated number of terms in each of the geometric progressions : 1,-a ,a^2-a^3,dotdotdotn terms (if a!=- 1)