Question

va rog ajutati-ma si pe mine la ex 1 si 2 dau inima

f22306ad7fe0b2be0293e70a16ffcfad.doc

Answer 1

Răspuns:

1.

4/√8 - 6/√2 + 2√5/√10 +(1/√18)^(-1) = 4/(2√2) - 6/√2 +2√5/(√2√5) + √18 =

2/√2 - 6/√2 + 2/√2 + 3√2 = (2√2 - 6√2 +2√2 + 6)/2 = (6 - 2√2)/2 = (3-√2)/2

2.

√6(5/√2 - 3/√3) - √3(2 - √6) = √6(5√3 - 3√2)/√6 -2√3 + √18 =

5√3 - 3√2 -2√3 + 3√2 = 3√3

3.

BC² = CD² - AB²   =>   BC² = 100 - 64 = 36   =>  BC = 6

Aria = AB x BC = 8x6 = 48