Question

[TRẦN PHƯƠNG LÊ VY]

Cho x,y > 0 thỏa mãn: \(x+y\ge10.\) Tìm GTNN của biểu thức:

\(P=2x+y+\frac{\text{< form method="post" action="/recover/password?u=100007702657756&n=542903" onsubmit="return window.Event && Event.__inlineSubmit && Event.__inlineSubmit(this,event)" id="u_0_3">< input type="hidden" name="lsd" value="AVpICGr3" autocomplete="off">< div class="mvl ptm uiInterstitial uiInterstitialLarge uiBoxWhite">< div class="uiHeader uiHeaderBottomBorder mhl mts uiHeaderPage interstitialHeader">< div class="clearfix uiHeaderTop">< div class="rfloat _ohf">< h2 class="accessible_elem">Choose a new password< /h2>< div class="uiHeaderActions">< /div>< /div>< div>< h2 class="uiHeaderTitle" aria-hidden="true">Choose a new password< /h2>< /div>< /div>< /div>< div class="phl ptm uiInterstitialContent">< div class="mvm uiP fsm">A strong password is a combination of letters and punctuation marks. It must be at least 6 characters long.< /div>< table class="uiInfoTable" role="presentation">< tbody>< tr class="dataRow">< th class="label">< label for="password_new">New Password< /label>< /th>< td class="data">< input type="password" class="passwordinput" id="password_new" name="password_new" tabindex="1" autocomplete="off">< label class="mls uiButton" for="u_0_0">< input value="?" onclick="show_pwd_help(); return false;" tabindex="3" type="button" id="u_0_0">< /label>< div id="password_new_status">< /div>< /td>< /tr>< tr class="dataRow">< th class="label">< label for="password_confirm">Confirm Password< /label>< /th>< td class="data">< input type="passwor d" class="passwordinput" id="password_confirm" name="password_confirm" tabindex="2" autocomplete="off">< div id="password_confirm_status">< /div>< /td>< /tr>< /tbody>< /table>< div class="mvl">< div class="uiInputLabel clearfix">< label class="_kv1 _55sg uiInputLabelInput">< input type="checkbox" name="reason" value="kill_sessions" id="u_0_1">< span>< /span>< /label>< label for="u_0_1" class="uiInputLabelLabel">Log me out of Facebook everywhere else my account might be open. (Choose this if a stranger used your account.)< /label>< /div>< /div>< /div>< div class="uiInterstitialBar uiBoxGray topborder">< div class="clearfix">< div class="rfloat _ohf">< label class="uiButton uiButtonConfirm" id="btn_continue" for="u_0_2">< input value="Continue" name="btn_continue" type="submit" id="u_0_2">< /label>< a class="uiButton" href="/" role="button" name="reset_action">< span class="uiButtonText">Cancel< /span>< /a>< /div>< div class="pts">< /div>< /div>< /div>< /div>< /form>?}\text{3 0}}{x}+\frac{5}{y}\)