Find the sum of `1.3+2.3^2+3.3^3+ . . . + 10.3^9`

Find the sum of 1 + 2 + 3 + …………… + 50 + 49 + ……… + 3 + 2 + 1

Find the sum: (-2/3)+(3/-4)

If 1^3 + 2^3 +3^3 +.....10^3 = 3025 , then find the value of 2^3+4^3+6^3 + .....+ 20^3

Find the sum 3(2)/(3)+ 1(5)/(6)+2

Find the sum of n-terms: [(1/1)+(1^3 +2^3)/2 +(1^3 +2^3 +3^3)/3+....to n -terms

Find the sum of the GP: (i) 1+3+9+27+... to 7 terms (ii) 1+sqrt(3)+3+3sqrt(3)+... to 10 terms (iii) 0.15+0.015+0.0015+... to 6 terms (iv) 1-1/2+1/4-1/8+... to 9 terms (v) sqrt(2)+1/sqrt(2)+1/(2sqrt(2))+... to 8 terms (vi) 2/9-1/3+1/2-3/4+... to 6 terms

Find the sum of the following series to n term: 1. 2. 4+2. 3. 7+3. 4. 10+ .......