A^(-n)= (a⁻¹)^(n) = (1/a)^(n) = <u>1^(n) </u>= <u> 1 </u>
a^(n) a^(n)
<span>(m+n)-(n+p)-(m+p)=m+n-n-p-m-p=-2p=-2*4=-8
</span>
{0,4x+1>0; {x>-10/4 ; x>-10/4; {x>-2,5
{-2x+3>0; {-2x>-3; {x<1,5 {x<1,5 (-2.5;1,5)
ctg240*ctg(-135)=ctg(270-30)*(-ctg(90+45))=ctg30*(-(-tg45))=