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posted by Haleemath Tuesday, May 7, 2013 at 3:50pm.

Find the sum of the G.p.2+6+18+54+...+1458

a = 2 r = 3 2*729 = 1458 729 = 3^6, so S7 = 2(3^7-1)/(3-1) = 2*2186/2 = 2186

Solve the equation simultaneously.1/3x+y=3,x+1/2y=4

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