If 1 / 9! + 1 / 10! = x / 11!, find the value of ''x''.
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1/9! + 1/10! = x/11!
1/9! + 1/10*9! = x/11!
1/9! { 1 + 1/10 } = x/11*10*9!
1+ 1/10 = x/11*10
11/10 = x/11*10
11 =x/11
11*11 = x
x = 121
hope u understand!!
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