1.

Range of the function `f(x)= "^(7-x)P_(x-3) `is given by(1) (13, 4, 5)(3) (1, 2, 3)

Answer» `nP_m` stands form `P_m=(n!)/((n-m)!)`
`m<=n`
n,m shall be there
n,m=0,1,2,3...
`x-3<=7-x`
`2x<=10`
`x<=5`
0,1,2,3,4,5.
`7-x>=0,x-3>=0`
`x<=T` at `x>=3`
`f(x)=((7-x)!)/((10-2x)!)`
`f(3)=(4!)/(4!)=1`
`f(4)=(3!)/(2!)=3`
`f(5)=(2!)/(0!)=2`
Range{1,2,3}
option 3 is correct.


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