Question

am nevoie de ajutor va rog​

Answer 1

Explicație pas cu pas:

$a = \sqrt{7} - 1$

$\sqrt{4} < \sqrt{7} < \sqrt{9} \iff 2 < \sqrt{7} < 3$

$2 - 1 < \sqrt{7} - 1 < 3 - 1 \iff 1 < \sqrt{7} - 1 < 2$

$\implies 1 < \bf a < 2$

$b = \sqrt{3} + \sqrt{4} = \sqrt{3} + 2 \implies \bf b > 2$

$a < 2 < b \implies a < b$