Question

Please help SAT practice

Answer 1

I can write it too

Answer 2

Im thinking all of them can be a positive integer.
Except for letter C

Answer 3

its B i cheated :( It's very hard

Answer 4

Probably have my instructor go over it more

Answer 5

only B

Answer 6

@surjithayer Did you substitute n with a negative and positive integer and plug it in all of the choices?

Answer 7

A n=-1
\[\left( -1 \right)^2-1=1-1=0\]
neither negative nor positive.
B.
n=-2
\[2\left( -1 \right)^2-1=2-1=1\]
positive integer.
C.
n=2
\[2^2-2^3=4-8=-4\]
it is a negative integer.
D.
n=-2
\[\left( -2 \right)^3-2=-8-2=-10\]
not a positive integer.
E.
try any negative integer.

Answer 8

thanks for teaching :)

Answer 9

yw