1.

Which of the following is true ({.} denotes the fractional part of the function)?

Answer»

ALWAYS 1
always -1
`(-1)^(n-m+1)`
`(-1)^(n-m)`

SOLUTION :`UNDERSET(XTOOO)lim(log_(E)x)/({x})=("positive infinity")/("a value between 0 and 1")=oo`
`underset(xto2^(+))lim(x)/(x^(2)-x-2)=underset(xto2^(+))lim(x)/((x-2)(x+1))=underset(hto0)lim(2+h)/(h(3+h))=oo`
`underset(hto-1)lim(x)/(x^(2)-x-2)=-underset(hto-1)lim(x)/((x-2)(x+1))`
`=underset(hto0)lim(-1-h)/((-3-h)(-h))=-underset(hto0)lim(1+h)/((3+h)(h))=-oo`


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