1.

यदि `1/(4!) + 1/(5!) = x/(6!)` तो x का मान ज्ञात कीजिए ।

Answer» Correct Answer - 36
`1/(4!) + (1)/(5!) = (x)/(6!) rArr (1)/(4!) + (1)/(5xx4!) = (x)/(6xx5xx4!)`
`1/(4!) + (1)/(5 xx4!) = (x)/(30xx4!)`
`1/(4!) [1+1/5] = x/(30xx4!)`
`6/5 = x/30`
`x = 36`


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