PHN MM V TH V MINH HA CC BI TON LIN QUAN N HM S GRAPH 4.3 VI GIAO DIN TING VITGraph l phn mm min ph, m ngun m gip cc bn v th ca nhiu loi hm s v minh ha kt qu ca nhiu bi ton lin quan n hm s nh: V tip tuyn, t mt min hnh phng, tnh din tch hnh phng, minh ha min nghim ca bt phng trnh hai n . . c bit vi phin bn mi Graph 4.3 bn c th la chn ngn ng Vietnamese c giao din ting Vit. Graph c kh nng v th vi cc dng phng trnh y = f(x); phng trnh tham s x = x(t), y = y(t) v phng trnh trong h ta cc r = f(t). Graph cn gip bn v th ca cc . Ngoi cc hm s lng gic vi n v th hin trn trc honh l bi ca hm c sn c nh ngha khi lp trnh, bn cn c th to cc hm ring cho mnh tin cho vic s dng ln sau. Graph c kh nng xut cc hnh do bn v ra dng nh *.bmp, *.jpg . . ., i vi cc hm c cha tham s, bn c th xem hiu ng hot hnh khi tham s thay i t ng, bn c th xut hiu ng ca hnh ra cc video *.avi s dng c lp. c bit bn c th nhng mt hnh thit k bng Graph vo mt slide ca PowerPoint, chnh sa ngay trong . Graph 4.3 c kch thc rt nh gn 3,06MB, tng thch vi Windows 98, Windows ME, Windows 2000 v Windows XP. Bn c th download ti a ch http://www.padowan.dk

1. La chn giao din ting Vit cho GraphKhi ci t, mc d c mc la chn ngn ng, nhng khng c la chn cho ting Vit, bn hy chn ting Anh (English). Ci t xong, bn khi ng Graph, lc ny Graph c giao din nh hnh di y.

la chn giao din ting Vit, bn chn menu Edit/Options . . . mn hnh Options xut hin, mc Language bn chn Vietnamese, sau chn OK.

Giao din ca Graph lc ny nh hnh di y:

n y bn c th khai thc Graph mt cch n gin v d dng phc v cng vic hc tp hay ging dy ca mnh. 2. Thit lp cc ty chn khc cho Graph Bn chn menu Chnh sa/H trc, hoc bm t hp phm Ctrl+A, hoc chn nt c hnh h ta trn thanh cng c, khi hp thoi Chnh sa h trc xut hin.

- hin li, bn check vo Hin th li. - hin th n v l bi ca trn trc, bn check vo Hin th n v theo dng tch vi s pi. - thay i khong n v trn trc, bn b check T ng nh du, sau nhp vo s th hin khong n v mi vo trc du check. - thay rng ca mt li ta , bn b check T ng chnh li, sau nhp vo s th hin khong n v mi vo trc du check. - lu cc ty chn ny mc nh cho cc hm s khc, bn check vo Ty chn mc nh trc khi bm nt ng Ch : Cc thy chn bn thit lp p dung cho tng trc ta ring bit ng vi tng Tab.

3. Chn vn bn ch thch vo hnh v Gi s bn c hnh minh ha hm s lin tc ti mt im nh hnh di y:

Bn mun chn vo vng hnh v hm s ca th , bn hy chn menu Hm s/Chn nhn (hoc bm F8), hp son vn bn hin ra

son cng thc ton hc bn click vo nt c ch OLE, hp thoi chn i tng hin ra, bn chn Microsoft Equation 3.0 (nh trong Word) v son hm s vo . Sau khi ng Microsoft Equation v hp thoi son tn li, kt qu nh hnh di dy.

4. Hm t to v hiu ng hnh nh t to mt hm ring cho mnh bn chn menu Hm s/Ty chnh hm s ( hoc bm Ctrl+F )

Ct Tn ch ra tn ca hm s hoc tham s cn to. Ct nh ngha bn nh ngha hm s ca mnh ng vi tn ch ra. V d hnh trn, dng u nh ngha tham s a, nhn gi tr -1, gi tr ca tham s c th thay i khi to hiu ng; dng th hai nh ngha hm s c tn lientuc(x) vi x l i s, cng thc ca hm s l if(x>a, 2x^2-3x+2, x+a+2) , ngha l nu x> a th lientuc(x)= 2x^2-3x+2, cn li lientuc(x) = x+a+2. Ch : Hm if() l hm chun ca Graph (xem danh mc cc hm chun ca Graph pha sau). Khi hm c cha tham s, bn c th to hiu ng xem s thay i ca th hm s khi tham s thay i. V d: Vi hm lientuc(x) = if(x>a, 2x^2-3x+2, x+a+2), khi bn cho a thay i t -1 n 0 bn s

nhn c s thay i ca th hm s ng vi a, khi a = 0 th th lc ny l th ca hm s lin tc ti x = 0. lm c vic ny bn chn menu Tnh/Hiu ng, hp thoi Hiu ng hin ra:

- Bn chn khong thay i ca tham s a l t -1 n 0 a) bn chn - Bc ( 0.01 - Khung hnh/giy (mi giy hin my hnh, mi hnh ng vi mt trng hp ca a) bn chn 8 khung hnh/giy. Cui cng bm hiu ng bn c:

Bm nt Play xem hiu ng. lu on hiu ng ny ra file video bn bm nt t tn file v lu file li. v chn Lu vi tn khc sau bn

5. Minh ha min nghim ca bt phng trnh hai n Bn chn menu Hm s/Chn mt mi quan h, hoc bm F6, hoc bm vo nt x

- Mi quan h: Bn nhp vo bt phng trnh hai n. - Rng buc: Bn nhp vo rng buc ca x v y, v d x>y (y c th l bt phng trnh th hai trong h). - Ghi ch: Ghi ch v bt phng trnh. Vi khai bo nh trn ta c kt qu nh sau:

6. Nhng mt hnh v bng Graph vo mt slide ca PowerPoint Ti mt slide ca PowerPoint cn nhng file Graph, chn menu Insert/Object Khi hp thoi chn i tng cn nhng hin ra

Chn Graph system v bm OK Khi ca s Graph hin ra v bn lm vic nh bnh thng, sau khi ng Graph li th Slied powerpoint nh sau:

Mun chnh sa li, bn nhy p vo cha th, ca s Graph hin ra cho ta chnh sa li. 7. Bin s, hng s, php ton v danh sch cc hm ca Graph Bin/ hng s

Php ton

Danh sch cc hm ph thng chun ca Graph

Cn nhiu hm cao cp na, cc bn t khm ph. Ch :