Question

Vreau sa mă ajutati la ex 4 subpunctele : f şi g

Answer 1

f)
I3-√10I+I5-√10I-2 =-3+√10+5-√10-2=0
3-√10<0
I3-√10I=-(3-√10)=-3+√10

5-√10>0
I5-√10I=5-√10


g) (-5/2)⁻¹ -2⁻¹ × 1/5 +0,2/√2 × √8=
=(-2/5)¹ -1/2 × 1/5 +(0,2/√2) × 2√2=
=-2/5 -1/10 +(0,2/1) × 2=
=-4/10 -1/10 +0,4=
=-4/10 -1/10 +4/10=-1/10

Answer 2

f)deoarece √10=3,16⇒I3-√10I=√10-3=3,16-3=0,16 si I5-√10I=5-3,16=1,84
⇒0,16+1,84-2=2-2=0
g)(-5/2)⁻¹=-2/5;2⁻¹=1/2;√8=√2³=2√2⇒
(-2/5)-1/2·1/5+0,2/√2·2√2=-2/5-1/10+0,4=-4/10-1/10+4/10=-1/10