Can I use Range for this lists

Questions
,
1

{1, -2, 3, -4, 5, -6, 7, -8, 9, -10}

{1, -1, 1, -1, 1, -1, 1}

2

Try:

-(-1)^Range[10]Range[10]
-(-1)^Range[10]
3

Another try

In[47]:= o = 0; Range[10] /. x_Integer :> (-1)^Mod[o++, 2] x
Out[47]= {1, -2, 3, -4, 5, -6, 7, -8, 9, -10}

In[46]:= o = 0; ConstantArray[1, 7] /. x_Integer :> (-1)^Mod[o++, 2] x
Out[46]= {1, -1, 1, -1, 1, -1, 1}