Check my answer for this binomial question, thanks!

[Yunie]

Find the first three terms in the expansion of

(i) (1 - 2x/3)^5

I have 1 - 10x/3 + 40x^2/9 + ... as the answer. Is my answer correct? If not, could anyone give me the correct answer and I will try to work it out...Thanks.

[Yunie]

Ohya, check the workings for this question too...

Find the first three terms in the expansion of

(i) (3 + x) ^5


(5C0) 3^5(x)^0 + (5C1) 3^4(x)^1 + (5C2) 3^3(x)^2. . .

=> 3^5 + 5 (3^4)x + 10 (3^3)x^2 . . .
=> 243 + 405x + 270x^2. . .


Thanks.