Question

Determinati nr real ''x'' care verifica egalitatile:a)x supra
Determinati nr real ''x'' care verifica egalitatile:
a)x supra 2√5=√15 supra 10
b)√6 supra x=√2 supra √6
c)x supra √2 - 3 supra √6=√2 supra √3
d)x supra √30 - √27 supra √10=2√30 supra 10
e)x(√5-√3)=5 supra √5 - 3+√3 supra √3 + 1

Efectuati urmatoarele calcule,amplificand formula(a+b)(a-b)=a la puerea 2-b la puterea 2:
a) (√6+√2)(√6-√2)=
b) (√5+√3)(√5-√3)=
c) (√18-√11)(√18+√11)=
d) (2+√3)(2-√3)=
e) (5-√2)(5+√2)=
f) (√7-1)(√7+1)=
g) (2√3-3)(2√3+3)=
h) (7+4√3)(7+4√3)=
i) (5√3+6√2)(5√3-6√2)=
j) (6√2-8)(6√2+8)=
k) (5√3+6√2)(3√5+2√6)=
l) (3√5+2√11)(3√5-2√11)=

Calculati suma inverselor numerelor a,b,c,unde:
a) a=√3+√2,b=√4+√3,c=√5+√4
b) a=√5+2,b=2√5+4,c=3+√5
c) a=3√2-2√3,b=3-2√2,c=3√3-5.
Multumesc daca se poate un raspuns rapid,va rog mult ajutati-ma:3

Answer 1

a)6-2=4
b)5-3=2
c)18-11=7
d)4-3=1
e)25-2=23
f)7-1=6
g)12-9=3
h)49-48=1
i)75-72=3
j)72-64=8
k)cred ca l-ai scris gresit
l)45-44=1
la celelalte ex. ii prea mult de scris