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Let f (x) be a function continuous for a...

Let f (x) be a function continuous for all except at x =0 such that
`f ' (x) gt 0 AA x gt 0 and f ' (x) lt 0 AA x lt 0.`
If `lim _(x to 0^(+)) f (x) = 10 , lim _(x to 0^(-))f (x) = 15 and f (0) = 12,` then `( lim _(x to 0) f (x ^(3) - x ^(2)))/(lim _( x to 0 )f ( 2x ^(4) - x ^(5))) + ( lim _(x to 0) [f (x ^(3) - x ^(2))])/( lim _(x to 0) [f (2x ^(4) - x ^(5)) ])=`
[.] denotes greatest integer Function)

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