Question

Use the binomial coefficient formula to calculate the binomial coefficient for the 7th term in a polynomial expansion when the power of the binomial is 8.

Answer 1

i need help under standing the problem...i dont get it

Answer 2

binomial coefficient refers to the constant in front of the term ryt?

Answer 3

i dont know

Answer 4

ok let me teach this binomial stuff to u so that u cn confidently tackle the others on ur own hpefully

Answer 5

if u hav (x+a)^2 what is the expansion?

Answer 6

i dont know...

Answer 7

x^2 +2ax + a^2

Answer 8

ok

Answer 9

do u knw hw i gt that answer?

Answer 10

distribute but i dont know

Answer 11

ok. do u see that the powers of x is decreasing in each term?

Answer 12

sure...

Answer 13

it goes x^2 then x^1 then x^0...power decreases all the time

Answer 14

ok ya

Answer 15

do u see that a's power increases all the time?

Answer 16

ya

Answer 17

now thats a pattern and thats how the terms are formed.now we need to find out hw the numbers in front of the terms are formed. but just to recap.hw wud (X+A)^3 look using the pattern

Answer 18

could you just show me the formula then what i plug into it and where

Answer 19

no.i want u to understand it. if they say (x+a)^3 then you start by writing decreasing powers of x next to increasing powers of a. so (x+a) ^3 = x^3a^0 + x^2a^1 + x^1a^2 + x^0a^3...get it?

Answer 20

yes, but i will get it if i just have formula and can plug in stuff i will be able to get on with all the other questiopns

Answer 21

there is no formula to get the constants in front of the terms..u have to use pascals triangle. im gana type each row of the triangle separately and il show u hw it works.

Answer 22

ok