1) question 30 of 29a in fitzpatrick 3u, soz i cant write it in in this post.
2) In the expansion of (2+3x)^n the coefficients of x^3 and x^4 are in the ratio 8:15. Find n
3) Find n if the coefficents of the 2nd, 3rd and 4th terms in the expansion of (1+x)^n are successive terms of an...