1.

The relation R(m, n) can be defined for every positive integer m,n as R (m,n)= m xx (m + 1) xx (m + 2) xx (m + 3) xx ……(m + n) and the relation R (1, n) is equal to n! or can be written as R (n). The H.C.F. of R 1(139, 2) and R (141):

Answer»

`(81 !)/(18)`
`(81 !) XX 18`
`36!`
`17 xx (19 + 62)`

ANSWER :A


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