\(\sqrt{24}+\sqrt{63}+3\)va 16 .so sanh
So sanh
16 va \(\sqrt{15}\). \(\sqrt{17}\)
Ta có :
√15.√17= √16-1.√16+1
=√162-1
Vì 162-1 < 162 nên
√162-1< √162
Vậy 16> √15.√17
\(\sqrt{15}\cdot\sqrt{17}=\sqrt{255}< \sqrt{256}=16\)
\(16=\sqrt{16^2}\)
\(16^2=\left(15+1\right).\left(17-1\right)=15.17-15+17=15.17+2\)
Mà \(15.17+2>15.17\)
\(\Leftrightarrow\sqrt{15.17+2}>\sqrt{15.17}\)
\(\Leftrightarrow16>\sqrt{15}.\sqrt{17}\)
1`)So Sanh
a)\(\sqrt{24}+\sqrt{45}\) va 12
b)\(\sqrt{37}-\sqrt{15}\)va 2
giup mk voi nhe
a,Ta có:
\(\left(\sqrt{24}+\sqrt{45}\right)^2=24+45=69\)
\(12^2=144\)
Do 69<144 nên ...
b,tương tự ý a
a ) Ta co \(\sqrt{24}+\sqrt{45}< \sqrt{25}+\sqrt{49}=5+7=12\)
vay \(\sqrt{24}+\sqrt{45}< 12\)
b)ta co \(\sqrt{37}-\sqrt{15}>\sqrt{4}-\sqrt{0}=2-0=2\)
vay \(\sqrt{37}-\sqrt{15}>2\)
so sanh \(\sqrt{49-16}\) va\(\sqrt{49}\) -\(\sqrt{16}\)
\(\sqrt{0,04}\) va \(0,04\)
\(8\) va \(\sqrt{8}\)
so sanh\(\sqrt{24}\)+\(\sqrt{35}\)va 11
\(\sqrt{24}+\sqrt{35}<\sqrt{25}+\sqrt{36}=5+6=11\)
Vậy \(\sqrt{24}+\sqrt{35}<11\).
So sanh 63^7 va 16^12
\(0,5\sqrt{100}-\sqrt[]{\frac{4}{25}}va\left(\sqrt{\frac{10}{9}}-\sqrt{\frac{9}{16}}\right):5\)
so sanh
(1+1_1/4+1_1/2+1_3/4+2+2_1/4+2_1/2+2_3/4+......+4_3/4) : 23 tính nhanh !!!!! Ai nhanh mình kêu anh chị mình vào nha !! Mình cần gấp lắm !! Cảm ơn mọi người
So sánh
\(\sqrt{50+2}va\sqrt{50}+\sqrt{2}\)
\(\sqrt{63-27}va\sqrt{63}-\sqrt{27}\)
so sanh 637va 1612
So sanh : \(\sqrt{2016}-\sqrt{2015}va\sqrt{\sqrt{2015}-}\sqrt{2014}\)