Question

Total number of terms in the expansion (x+a)^80 + (x-a)^80 is ?

Answer 1

hba is right .
162
because if we have
(x+a)^n
then the no of terms are n+1 after expansion in binomial series .

Answer 2

oh thanks for getting this revised.

Answer 3

But u see ....i want the answer after expansion

Answer 4

there are common terms which cancels off in the expansion

Answer 5

81 terms for first one 81 for the second one so adds up to 162 .....
total no of terms are 162 ...
there are some common terms ...
let me check it ...

Answer 6

i guess it to be low because the terms with same powers should be added ...

Answer 7

i think 41..is the answer...wat u say @sami-21

Answer 8

(x-a)^80 total terms 81 40 are negative and 41 are positive

Answer 9

it is 41 terms

Answer 10

after cancellation and addition

Answer 11

(x+a)^80 total terms 81

81 - 40 = 41

Answer 12

Yup..) thxx.....for Confirming....

Answer 13

exactly as u said it @Yahoo!