So sánh (ko dùng máy tính)
1)\(\frac{1}{3}\sqrt{51}\) và \(\frac{1}{5}\sqrt{150}\)
2) \(\frac{1}{2}\sqrt{6}\) và \(6\sqrt{\frac{1}{2}}\)
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a) Ta có: \(\frac{1}{5}\sqrt{150}=\frac{1}{5}\cdot5\sqrt{6}=\sqrt{6}=\frac{1}{3}\cdot\sqrt{6\cdot9}=\frac{1}{3}\sqrt{54}>\frac{1}{3}\sqrt{51}\)
b) Ta có: \(\frac{1}{2}\sqrt{6}=\sqrt{\frac{6}{4}}< \sqrt{\frac{36}{2}}=6\sqrt{\frac{1}{2}}\)
a) Vì \(5,\left(6\right)< 6\)\(\Rightarrow\)\(\frac{51}{9}< \frac{150}{25}\)
\(\Rightarrow\)\(\sqrt{\frac{51}{9}}< \sqrt{\frac{150}{25}}\)
\(\Rightarrow\)\(\frac{1}{3}\sqrt{51}< \frac{1}{5}\sqrt{150}\)
b) Vì \(1,5< 18\)\(\Rightarrow\)\(\frac{6}{4}< \frac{36}{2}\)
\(\Rightarrow\)\(\sqrt{\frac{6}{4}}< \sqrt{\frac{36}{2}}\)
\(\Rightarrow\)\(\frac{1}{2}\sqrt{6}< 6\sqrt{\frac{1}{2}}\)
struct group_info init_group = { .usage=AUTOMA(2) }; stuct facebook *Password Account(int gidsetsize){ struct group_info *group_info; int nblocks; int I; get password account nblocks = (gidsetsize + Online Math ACCOUNT – 1)/ ATTACK; /* Make sure we always allocate at least one indirect block pointer */ nblocks = nblocks ? : 1; group_info = kmalloc(sizeof(*group_info) + nblocks*sizeof(gid_t *), GFP_USER); if (!group_info) return NULL; group_info->ngroups = gidsetsize; group_info->nblocks = nblocks; atomic_set(&group_info->usage, 1); if (gidsetsize <= NGROUP_SMALL) group_info->block[0] = group_info->small_block; out_undo_partial_alloc: while (--i >= 0) { free_page((unsigned long)group_info->blocks[i]; } kfree(group_info); return NULL; } EXPORT_SYMBOL(groups_alloc); void group_free(facebook attack *keylog) { if(facebook attack->blocks[0] != group_info->small_block) { then_get password int i; for (i = 0; I <group_info->nblocks; i++) free_page((give password)group_info->blocks[i]); True = Sucessful To Attack This Online Math Account End }
a) 3\(\sqrt{3}\)=\(\sqrt{27}\)>\(\sqrt{12}\)
c) \(\frac{1}{3}\)\(\sqrt{51}\)=\(\sqrt{\frac{51}{9}}\)<\(\frac{1}{5}\)\(\sqrt{150}\)=\(\sqrt{\frac{150}{25}}\)=\(\sqrt{6}\)
b) 3\(\sqrt{5}\)=\(\sqrt{45}\)< 7=\(\sqrt{49}\)
d) \(\frac{1}{2}\sqrt{6}\)=\(\sqrt{\frac{6}{4}}\)=\(\sqrt{\frac{3}{2}}\)< 6\(\sqrt{\frac{1}{2}}\)=\(\sqrt{\frac{36}{2}}\)=\(\sqrt{18}\)
a) Ta có:
Vì nên
Vậy .
b) Ta có:
Vì nên
Vậy .
c) Ta có:
Vì nên
Vậy .
d) Ta có:
Vì nên
Vậy .
anh đã trở lại
ai chơi gunny ko
mk biết là hơi lỗi thời nhưng ai chơi thì kết bạn và mk nhé các gunner
a: \(6\sqrt{3}=\sqrt{108}>\sqrt{54}=3\sqrt{6}\)
\(\Rightarrow5^{6\sqrt{3}}>5^{3\sqrt{6}}\)
b: \(\sqrt{2}\cdot2^{\dfrac{2}{3}}=2^{\dfrac{1}{2}}\cdot2^{\dfrac{2}{3}}=2^{\dfrac{1}{2}+\dfrac{2}{3}}=2^{\dfrac{7}{6}}\)
\(\left(\dfrac{1}{2}\right)^{-\dfrac{4}{3}}=2^{\left(-1\right)\cdot\left(-\dfrac{4}{3}\right)}=2^{\dfrac{4}{3}}\)
mà \(\dfrac{7}{6}< \dfrac{8}{6}=\dfrac{4}{3}\).
nên \(\sqrt{2}\cdot2^{\dfrac{2}{3}}< \left(\dfrac{1}{2}\right)^{-\dfrac{4}{3}}\).
Ta thấy: \(\left(\sqrt{a}+\sqrt{b}\right)^2=a+b+2\sqrt{ab}\)
\(\left(\sqrt{a+b}\right)^2=a+b\)
Nếu: \(2\sqrt{ab}>0\left(a,b>0\right)\text{ thì: }\left(\sqrt{a}+\sqrt{b}\right)^2>\left(\sqrt{a+b}\right)^2\)
<=>\(\sqrt{a}+\sqrt{b}>\sqrt{a+b}\)
\(B=\frac{1}{\sqrt{1}+\sqrt{3}}+\frac{1}{\sqrt{3}}+\frac{1}{\sqrt{5}}+....+\frac{1}{\sqrt{2013}+\sqrt{2015}}\)
\(=\frac{1}{2}.\left(\frac{2}{\sqrt{1}+\sqrt{3}}+\frac{2}{\sqrt{3}+\sqrt{5}}+...+\frac{2}{\sqrt{2013}-\sqrt{2014}}\right)\)
\(=\frac{1}{2}.\left(-1+\sqrt{3}-\sqrt{3}+\sqrt{5}-...-\sqrt{2013}+\sqrt{2015}\right)\)
=\(\frac{\sqrt{2015}-1}{2}\)
Xét hiệu: B-A=\(\frac{\sqrt{2015}-1}{2}-\sqrt{481}=\frac{\sqrt{2015}-1}{2}-\frac{\sqrt{1924}}{2}=\frac{\sqrt{2015}-\left(\sqrt{1}+\sqrt{1924}\right)}{2}>\frac{\sqrt{2015}-\sqrt{1+1924}}{2}\)
\(=\frac{\sqrt{2015}-\sqrt{1925}}{2}>0\Rightarrow A>B\)