যদি x+2y=4 এবং xy=2 হয়, তবে x= কত?
A
২
B
০
C
১২
D
১
Correct Answer: ২
প্রস্নঃ যদি x + 2y = 4 এবং xy = 2 হয়, তবে x = কত? এখানে, x + 2y = 4 - - - - - - - - - - - - - - - - - - - - - (১) এবং, xy = 2 - - - - - - - - - - - - - - - - - - - (২) বা, y = 2/x তাহলে, (১) = > x + 2*(2/x) = 4 বা, x + x = 4 বা, 2x = 4 x = 2 Normal 0 false false false EN - US X - NONE X - NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso - style - name:"Table Normal"; mso - tstyle - rowband - size:0; mso - tstyle - colband - size:0; mso - style - noshow:yes; mso - style - priority:99; mso - style - qformat:yes; mso - style - parent:""; mso - padding - alt:0in 5.4pt 0in 5.4pt; mso - para - margin - top:0in; mso - para - margin - right:0in; mso - para - margin - bottom:10.0pt; mso - para - margin - left:0in; line - height:115%; mso - pagination:widow - orphan; font - size:11.0pt; font - family:"Calibri", "sans - serif"; mso - ascii - font - family:Calibri; mso - ascii - theme - font:minor - latin; mso - hansi - font - family:Calibri; mso - hansi - theme - font:minor - latin; mso - bidi - font - family:"Times New Roman"; mso - bidi - theme - font:minor - bidi;}