Question

testul 2 exercițiul 2 repedeeee

Answer 1

$a = (2 + 4 + 6 + ... + 288) - 144$

$a = 2(1 + 2 + 3 + ... + 144) - 144$

$a = 2 \times \frac{144(144 + 1)}{2} - 144$

$a = 144(144 + 1) - 144$

$a = 144 \times 145 - 144$

$a = 144(145 - 1)$

$a = 144 \times 144$

$a = {144}^{2} = > p.p$

$\sqrt{a} = \sqrt{ {144}^{2} } = 144$