Page 159 - sscbbb

157. If α and β are the roots of equation x2 - x + 1 = 0, then which equation will have roots 3 and 3 ?
मददαऔयβसभीकयणx2 -x+1=0, के भरू हैतो, 3 औय 3 ककससभीकयणके भरू है?
17 February 2018 SSC MAINS
[A]x2 +2x+1=0 [B]x2 -2x-1=0
[C]x2 +3x-1=0 [D]x2 -3x+1=0
158. If 3x + 5y + 7z = 49 and 9x + 8y + 21z = 126, then what is the value of y?
मदद 3x + 5y + 7z = 49 औय 9x + 8y + 21z = 126 है, तो y का भान क्मा है?
17 February 2018 SSC MAINS
[A] 4 [B] 2 [C] 3 [D] 5
159. Cost of 4 pens, 6 note books and 9 files is Rs 305. Cost of 3 pens, 4 notebooks and 2 files is Rs 145. What is the cost (inRs) of 5 pens, 8 notebooks and 16 files?
4ऩेन,6नोटफकु औय9पाइरकाभल्ू म305रुहै।3ऩेन,4नोटफकु औय2पाइरकाभल्ू म145रुहै। 5ऩेन,8नोटफकु औय16पाइरकाभल्ू म(रुभें)क्माहै?
[A] 415 [C] 440
17 February 2018 SSC MAINS
[B] 465
[D] Cannot be determined/ ननधारण यत नहीॊ ककमा जा सकता
18 February 2018 SSC MAINS
160. If x = (√5) + 1 and y = (√5) – 1, then what is the value of (x2 / y2) + (y2 / x2) + 4[(x/y) + (y/x)] + 6?
मदद x=(√5)+1औय y=(√5)–1है,तो(x2 /y2)+(y2 /x2)+4[(x/y)+(y/x)]+6का भान क्मा है?
[B] 23√5 [C] 27√5 [D] 25
मदद x=2+√3,y=2–√3औय z=1है,तो (x/yz)+(y/xz)+(z/xy)+2[(1/x)+(1/y)+
[A] 31
161. If x = 2 +√3, y = 2 – √3 and z = 1, then what is the value of (x/yz) + (y/xz) + (z/xy) + 2 [(1/x) + (1/y) + (1/z)]?
(1/z)] का भान क्मा है?
[A] 25 [B] 22 [C] 17 [D] 43
[A] 35/3 [B] 37/3 [C] – 105/11 [D] – 105/13 163. If x = (a/b) + (b/a), y = (b/c) + (c/b) and z = (c/a) + (a/c), then what is the value
18 February 2018 SSC MAINS
162. A root of equation ax2 + bx + c = 0 (where a, b and c are rational numbers) is 5 + 3√3. What is the value of (a2 + b2 + c2) / (a + b + c) ?
एक सभीकयणax2 +bx+c=0(जहाॉ a,bऔय cऩरयभेम सॊख्मा हैं) का भरू 5+3√3है ।(a2 +b2 +c2)/(a+b+c)का भान क्मा है? 18February2018SSCMAINS
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