Register

ISI2018-DCG-11

• recategorized by
704 views
1 1 vote

The sum of $99^{th}$ power of all the roots of $x^7-1=0$ is equal to

  1. $1$
  2. $2$
  3. $-1$
  4. $0$

Please log in or register to answer this question.

Voting & Accepting an answer helps improve the community
← Previous · ISI2018-DCG-12Next → · ISI2018-DCG-10
← Previous in category · ISI2018-DCG-13Next in category → · ISI2018-DCG-3
Position:
Show:

Related questions

1 1 vote
1 1 answer
663
663 views
gatecse asked Sep 18, 2019
663 views
ISI2018-DCG-10
Let $f’(x)=4x^3-3x^2+2x+k,$ $f(0)=1$ and $f(1)=4.$ Then $f(x)$ is equal to$4x^4-3x^3+2x^2+x+1$$x^4-x^3+x^2+2x+1$$x^4-x^3+x^2+2(x+1)$none of these
1 1 vote
1 1 answer
1.7k
1.7k views
Arjun asked Sep 23, 2019
1,742 views
ISI2015-MMA-12
Consider the polynomial $x^5+ax^4+bx^3+cx^2+dx+4$ where $a,b,c,d$ are real numbers. If $(1+2i)$ and $(3-2i)$ are two two roots of this polynomial then the value of $a$ i...
3 3 votes
2 2 answers
1.4k
1.4k views
gatecse asked Sep 18, 2019
1,381 views
ISI2018-DCG-1
The digit in the unit place of the number $7^{78}$ is$1$$3$$7$$9$
0 0 votes
1 1 answer
985
985 views
gatecse asked Sep 18, 2019
985 views
ISI2018-DCG-3
If the co-efficient of $p^{th}, (p+1)^{th}$ and $(p+2)^{th}$ terms in the expansion of $(1+x)^n$ are in Arithmetic Progression (A.P.), then which one of the following is ...