" Find "F_(net)=GMm[(1)/(r^(2))+(1)/(2r^(2))+(1)/(4r^(2))+............" to "oo]

Find F_("net") = GMm[ (1)/(r^(2))+ (1)/(2r^(2))+ (1)/(4r^(2))+ ...... "up to "oo] .

Find F_("net") = GMm[ (1)/(r^(2))+ (1)/(2r^(2))+ (1)/(4r^(2))+ ...... "up to "oo] .

if r>1 and x=a+(a)/(r)+(a)/(r^(2))+.........oo,y=b-(b)/(r)+(b)/(r^(2))-(b)/(r^(2)) and z=c+(c)/(r^(2))+(c)/(r^(4))+............oo then (xy)/(z)

Find Lt(n rarr oo) sum_(r=0)^(n-1)(1)/(sqrt(n^(2) - r^(2))

Find: sum_(r=1)^oo (-8) (-1/2)^r

sum_(r=1)^(oo)tan^(-1)((2)/(1+(2r+1)(2r-1)))

sum _(r = 2) ^(oo) (1)/(r ^(2) - 1) is equal to :

Find sum_(r=1)^oo (-8) (-1/2)^r