# Math Help - exponent confusion

1. ## exponent confusion

say i have a function $(-a)^{x+1}$, does this mean the exponent part of the function is a negative also? e.g. bring the +1 part of (x+1) down so,
$(-a) (-a)^x or-is-it (a)(-a)^x$

another e.g. $(-1)^{x+1} = (-1)(-1)^x or-is-it (1)(-1)^x$

say i have a function $(-a)^{x+1}$, does this mean the exponent part of the function is a negative also? e.g. bring the +1 part of (x+1) down so,
$(-a) (-a)^x or-is-it (a)(-a)^x$
another e.g. $(-1)^{x+1} = (-1)(-1)^x or-is-it (1)(-1)^x$
Consider the substitution u=-a. Now look at $u^{x+1}=(u^x)(u)$. Now plug back in -a for u and you get the desired relation.