Question

expand this number (1+2/3a)³

Answer 1

Hey Friend ☺

We know that ,

( a + b )^3 = a^3 + 3a^2b + 3ab^2 + b^3

So

( 1 + 2/3a )^3 = ( 1 )^3 + 3* ( 1 )^2* ( 2/3a ) + 3*1*( 2/3a )^2 + ( 2/3a )^3

= 1 + 2/a + 4/3a^2 + 8/27a^3

Hope it helps you ..!!

✌

Answer 2

Answer:

$\huge\blue{\mid{\fbox{\tt{Solution:-}}\mid}}$

${(1 + \frac{2}{3}a) }^{3}$

$= {(1)}^{3} + {( \frac{2}{3}a) }^{3} + 3(1)( \frac{2}{3} a )(1 + \frac{2}{3} a)$

$=1 + { \frac{8}{27}a }^{3} + 2a(1 + \frac{2}{3} a)$

$=1 + { \frac{8}{27} a}^{3} + 2a + { \frac{4}{3}a }^{2}$

$\small\red{\mid{\fbox{\tt{Hope it's helpful uh ♡♡}}\mid}}$