Question

a)Comparati nr. a si b unde
a=l3-5l si
b=-(8-1)+2 la puterea 3
b)Stiind ca ab+ac-8=32 si b+c=10,calculati a-(b+c)

Answer 1

a.  a=3-5=-2;
     b=[8-1]+2³=7+8=15;
⇒-2<15⇒a<b;
b.  ab+ac=8+32
⇒ab+ac=40;
⇒a[b+c]=40
⇒a·10=40⇒a=4;
⇒a-[b+c]
⇒4-10⇒-6;