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[" 2.Find "x" if "(1)(1)/(6!)+(1)/(71!)=...

[" 2.Find "x" if "(1)(1)/(6!)+(1)/(71!)=(1)/(8!)(11)(1)/(8!)+(1)/(9!)=(1)/(10!)],[" 3.Show that "n!(n+2)=n!+(n+1)!]

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(i) If (1)/(9!)+(1)/(10!)=(n)/(11!) , find n. (ii) If (1)/(8!)+(1)/(9!)=(x)/(10!) , find x.

Find the value of n if (n)/(11!) = (1)/(9!) +(1)/(10!) .

Find the value of n if (n)/(11!) = (1)/(9!) +(1)/(10!) .

If (1)/(9!)+(1)/(10!)=(n)/(11!) , then n=121 .

If 1/(9!)+1/(10!) =n/(11!) , find n.

Lt_(x to oo)((1+(1)/(2)+(1)/(4)+(1)/(8)+....+(1)/(2^(n)))/(1+(1)/(3)+(1)/(9)+.....+(1)/(3^(n))))=