1it is because every general term will be of the form
Ckxk where C is its coefficient
when you put x=1 we have the sum as ΣCk which gives the sum of coefficients
but putting x=-1 will give it as -C1+C2 ... which is not the sum
The sum of the coefficients of the polynomial (1-x-x2)313
-
UP 0 DOWN 0 0 5
5 Answers
11Q38 The sum of the coefficients of the polynomial (1-x-x2)313
a) 0
b) -1
c) 1
d) can't be determined
Your Answer: (a)
Correct Answer: (b)
Score: -1
Explaination :
it can be obtained by putting x=1 in the expression
(-1)313=-1
what is the basic way to do this 1 ??
y can't we put x=-1??????
1yeah rite answer is -1
we always put x=1
kyun............papa ko pooch :P
11i am not in the mood to joke
please can anybody help in his 1??
111but i will be glad to see the actual method
if u can provide it
I will be thankful to u [1]