m-1m=5 হলে,m3-1m3= কত ?
A
110
B
130
C
135
D
140
Correct Answer: 140
দেয়া আছে, m - 1/m = 5 আমরা জানি, (a - b)3 = a3 - b3 - 3ab(a - b) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - [সুত্রঃ] তাহলে, (m - 1/m)3 = m3 - 1/m3 - 3*m*1/m* (m - 1/m) বা, (m - 1/m)3 = m3 - 1/m3 - 3(m - 1/m) বা, m3 - 1/m3 = (m - 1/m)3 + 3(m - 1/m) - - - - - - - - - - - - - [পক্ষ পরিবর্তন করে ] = 53 + 3*5 - - - - - - - - - - - - - - - - - - - - - - - - - - - - [ m - 1/m = 5 মান বসিয়ে ] = 125 + 15 = 140 সুতরাং, m3 - 1/m3 = 140 (Ans:) 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;}