9.2n-2.2n-1= কত ?
9.2n-2.2n-1= কত ? Correct Answer 2n+3
<math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>9</mn><mo>.</mo><msup><mn>2</mn><mi>n</mi></msup><mo> </mo><mo> - </mo><mo> </mo><mn>2</mn><mo>.</mo><msup><mn>2</mn><mrow><mi>n</mi><mo> </mo><mo> - </mo><mo> </mo><mn>1</mn></mrow></msup><mo> </mo><mspace linebreak = "newline"/><mn>9</mn><mo>.</mo><msup><mn>2</mn><mi>n</mi></msup><mo> </mo><mo> - </mo><mo> </mo><mn>2</mn><mo>.</mo><mfrac><msup><mn>2</mn><mi>n</mi></msup><mn>2</mn></mfrac><mspace linebreak = "newline"/><mo> = </mo><mo> </mo><msup><mn>2</mn><mi>n</mi></msup><mo> </mo><mfenced><mrow><mn>9</mn><mo> </mo><mo> - </mo><mo> </mo><mn>1</mn></mrow></mfenced><mspace linebreak = "newline"/><mo> = </mo><mo> </mo><msup><mn>2</mn><mi>n</mi></msup><mo> </mo><mo>.</mo><mo> </mo><mn>8</mn><mspace linebreak = "newline"/><mo> = </mo><mo> </mo><msup><mn>2</mn><mi>n</mi></msup><mo> </mo><msup><mn>2</mn><mn>3</mn></msup><mspace linebreak = "newline"/><mo> = </mo><msup><mn>2</mn><mi>n</mi></msup><mo> </mo><mo> + </mo><mo> </mo><mn>3</mn><mspace linebreak = "newline"/></math>