Question

In the expansion of (a+x)^6 the first three terms are 1+3+3.75. Find the values of a and x.

Answer 1

You must have been studying binomial expansions: that will give you the coefficients for terms 2 and 3.

Answer 2

1=6C0(a^6)?
1=a^6
a=1?

Answer 3

yup i got it

Answer 4

good

Answer 5

and then
3=6C1(a^6-1)(x^1)
3=6x
x=0.5

Answer 6

awesome i got it.

Answer 7

correct