`A = ( 1 + 1/x ) . ( 1 + 1/( x + 1 ) ) . ( 1 + 1/( x + 2 ) ) .... ( 1 + 1/x + 9 )`
`A = ( x/x + 1/x ) . ( (x + 1 )/( x + 1 ) + 1/( x + 1 )) . ( ( x + 2 )/( x + 2 ) + 1/( x + 2 )) .... ( ( x + 9 )/( x + 9 ) + 1/( x + 9 )) `
`A = ( x + 1 )/x . ( x + 2 )/( x + 1 ) . ( x + 3 )/( x + 2 )+ ... + ( x + 10 )/( x + 9 )`
`A = ( ( x + 1 ) . ( x + 2 ) . ( x + 3 ) ... ( x + 10 ) )/( ( x . ( x + 1 ) . ( x + 2 ) .... ( x + 9 ) )`
`A = ( x + 10 )/x`