1.

Find the sum of `h+2e^(2)h+2e^(4)h+2e^(6)h +.....`

Answer» `h[1+2e^(2)(1+e^(2)+e^(4)+.....)]`
`=h[1+2e^(2)((1)/(1-e^(2)))]`
`=h((1+e^(2))/(1-e^(2)))`


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