GRADE 11-PRE-CALCULUS

Question

GRADE 11-PRE-CALCULUS

 1.) 22nd term of (x-3)^20

2.) The nth terms of the series 3 + 7 + 13 + 21 +………. is

3.) 3rd term of (2y-3)^7

4.) Sum of the coefficient of first and 6th term: (x-5)^6

5.) Find the coefficient of the 6th term: (4x-3)^8

6.) Find the middle term: (2x+5)^10

Answer 1

Bella,

question 2 is a strange one because there are many possible answers. The easiest is to see that first you add 4, then you add 6, then you add 8.... This could be changed into an algebraic expression if needed

the rest of the questions require binomial expansion, and if you have done "combinations," then the answers are simple. If you are not familiar with "_nC_r" then I am not sure how you are expected to answer-- can you say briefly how you are supposed to answer these?--Andrew