2 szkoły ponadpodstawowej

II liceum

a) &nbsp; x=0 &nbsp; D=R\{0} &nbsp; &nbsp; b)

a) x+2=0   ⇒   x=−2   ⇒   D=R\{−2} 2∈D

a) x2+9=0   ⇒   &gt;0x2​=−9   ⇒   x∈R   ⇒   D=R f(−3)=(−3)2+96⋅(−3)​=9+9−18​=18−18​=−1 f(1)=12+96⋅1​=106​=53​

a) 32364​⋅27324​= &nbsp; 3244​⋅3243​= &nbsp; 1 &nbsp; &nbsp; b) 78728​⋅54652​=

a) 21​+32​+65​=63​+64​+65​=612​=2 b) 121​+31​+243​=1126​+124​+2129​=31219​=4127​

a) &nbsp; 21​−31​+m=0 &nbsp; m=31​−21​=62​−63​=−61​ &nbsp; &nbsp; &nbsp; b) &nbsp; 52​−43​+m=0 &nbsp; m=43​−52​=2015​−208​=207​