find the sum of `3/5+3/8

Find the sum of first 8 multiples of 3.

The mean of 5 observations is 8 , Find the sum of the 5 observations.

Re- arrange suitably and find the sum: 5/3+(11)/2+\ (-9)/4+\ (-8)/3+\ (-7)/2

Re-arrange suitably and find the sum in each of the following: 3/5+7/3+9/5+(-13)/(15)+(-7)/3 (ii) 4/(13)+(-5)/8+(-8)/(13)+9/(13)

Find the sum of the following algebraic expressions : 3a - 4b + 5c , 2a + 3b - 6c , - 5a + 8b + 7c

Find the sum of the following series to n term: 2^3+4^3+6^3+8^3+..........

Prove that : Find the sum of the infinite series 1+(2)/(3).(1)/(2)+(2.5)/(3.6)((1)/(2))^(2)+(2.5.8)/(3.6.9)((1)/(2))^(3)+......oo

Find the sum of the first 22 terms of the AP : 8,3,-2, . . . .

Find the sum of the first 22 terms of the A.P. : 8, 3, -2,………….

Find the sum of 8 terms of the G.P. : 3+6+12+24+ . . . . .. . . . . .