Page 161 - sscbbb

p3 +q3 +r3 -3pqr=4है.मदद a=q+r,b=r+pऔयc=p+q है,तो a3 +b3 +c3 -3abc
का भान क्मा है?
19 February 2018 SSC MAINS
[A] 4
171. If and
whose roots are and ?
[B] 8 [C] 2 [D] 12
are the roots of the equation x2 + x - 1 = 0,then what is the equation
मदद औय सभीकयणों के भरू x2 +x-1=0 हैं तो, औय के भरू ों के सभीकयण क्मा
है?
[A]x2 +7x-1=0
[C]x2 -711x-1=0
172. If x and y are natural numbers such that x + y = 2017, then what is the value of (-1)x + (-1)y?
मदद xऔय yप्राकृनतक सॊख्माएॊ इस प्रकाय हैं कक x+y =2017 हैं,तो (-1)x +(-1)y क्मा होगा? 19 February 2018 SSC MAINS
[A] 2 [B] – 2 [C] 0 [D] 1 173. If x + (1/x) = (√ +1)/2 , then what is the value of x4 + (1/x4) ?
मदद x+(1/x)=(√ +1)/2 है ,तोx4 +(1/x4) का भान क्मा होगा?
19 February 2018 SSC MAINS
[A]( √ 1)/4 [B]( √ 1)/2 [C](- √ 1)/4 [D]( 174. If a + a2 + a3 -1 = 0 , then what is the value of a3 +(1/a)?
मददa+a2 +a3 -1=0,है,तोa3+(1/a) का भान क्मा होगा?
19 February 2018 SSC MAINS
का भान
√ 1)/2
19 February 2018 SSC MAINS
[B]x2 -7x-1=0 [D]x2 +11x-1=0
[A] 1 [B] 4 [C] 2 [D] 3
175. If a – (1/a) = b, b – (1/b) = c and c – (1/c) = a, then what is the value of (1/ab) + (1/bc) + (1/ca)?
मदद a–(1/a)=b,b–(1/b)=cऔय c–(1/c)=aहै,तो (1/ab)+(1/bc)+(1/ca)का भान क्मा होगा? 19 February 2018 SSC MAINS
[A] – 3 [B] – 6 [C] – 1 [D] – 9 176. If the roots of the equation a(b - c)x2 +(c - a)x + c(a - b) = 0 are equal,then which of the following is true?
मदद सभीकयण a(b-c)x2 +(c-a)x+c(a-b)=0के भरू के फयाफय है,तो ननम्नभरखखत भें से
कौन – सा सत्म है ?
[A] b = (a + c)/ ac
[C] 2b = (1/ a) + (1/c) 177. If [√ ] b2) ?
19 February 2018 SSC MAINS
[B] 2/b = (1/ a) + (1/c)
[D] abc= ab + bc+ ca
+ √ ] = 1,then what is the value of (1 – a2) (1 –
169