NOTE THAT: DIRECT MOBILE SUBSCRIBERS GETS ANSWERS FIRST BEFORE ITS BEEN POSTED HERE NECO MATHS ANSWERS +++++++++++++++++++++ KEEP REFRESHING THIS PAGE +++++++++++++++++++++ Verified MATHS OBJ: 1-10: BBACBECBDE 11-20: CBAAABCDBB 21-30: EBDABCCDBD 31-40: DCDACCBBAB 41-50: EEBCEBBCDA 51-60: CCCECECDBE ======================= NOTE: ^ means raise to power * means multiplication tita u should know dat. rais means raise to power sqr rut/ squar rut means square root / means division ===================== USE DIS NO1 (1a) U=32, n(p)=16, n(G)=18 and n(P^!union G^!) 16-x+x+18-x+3=32 34+3-x=32 37-x=32 -x=32-37 -x=-5 x=5 (1b) ((9/4+(3/2))/((49/8)-11/4)= ((18+12)/8)/((196-88)/32) =(30/8)*(32/108) =(30*4)/108=30/27=10/9 =1 whole no 1/9 --------------------------------------- (2a) rx=99cm,ry=101cm hx=hy=2.1m Vx=pie(rx sqr)hx =pie(0.99)^2*2.1 Vx=2.006 pie m^3 Vx=2.06 pie M^3 Vy=pie (ry)^2hy Vy=pie (1.10)^2*2.1 Vy=2.14 pie m^3 their difference is V=vy-vx v=2.14pie-2.06pie v=0.08pie=0.08*3.142 v=0.258m^3 (2b) (a^2-2a)/a-(a^2-a^3)/a^2-(a) a-2-(1-a)-a a-2-(1-a)-a a-2-1+a-a =a-3 ----------------------------------------- (3a) tan25 degreee=TP/XP let tita be the angle of elevation tan tita=TP/120 tan 25 degree= TP/150, TP=tan 25 degree*150 TP=69.95m=70m tan tita=70/120, tan tita=0.583 tita=tan^-1(0.583)=30.24 dgree. the angle is 30 degree (3b) let TP be the distance , Tp=70cm ------------------------------------- (Q6a) number 16|17|18|19|20|21|22|23 binary equivalant 10000|10001|10010|10011| 10100|10101|10110|10111 (i)prob(last digit zero) =2/8=1/4 (ii)prob(at least two ones)=7/8 (iii)prob(three ones and zeros)=6/8=3/4 --------------------------------------- (Q7)using cosine rule a2=b2+c2-2bccosA =902+502-2*90*50cos125 =810+2500-22500*-0:5736 =3310+12906 =16216 a=square root of 16216 =127.3 =127km ---------------------------------------- (9)log2-log25/100+log32 =log(2/25/100)*32 log2/1*100/25*32 Log8[2*4*32] Log8[8*32] =log8[8]+log8[32] 1+log8[32] (9b)sn=n/2[2a+(n-1)d] Sn=n/2*2a+n/2(nd-d) Sn-na=(n2d-nd/2) 2(sn-na)=n^2d-nd 2sn-2ma=d(n^2-n) d=(2sn-2na)/n^2-n
Posted on: Sat, 09 Nov 2013 13:14:59 +0000