... gˆa`nd´ung 5 2 −0, 15 2+0, 15 Sˆo´d˜a cho l`a gi´a tri.cu’a h`amy = 5 2 − x2+xta.idiˆe’m x =0, 15. Ta d˘a.t x0=0;∆x =0, 15. Ta c´oy=−4 5 2 −x2+x 5( 4 − x2)= −4y 5( 4 ... mˆo.tbiˆe´n 25. y = tg 45 ◦10.(DS. 0,99)26. y = ln(10, 21). (DS. 1,009)27. y = sin 31◦.(DS. 0 ,51 )28. y = arcsin0, 54 . (DS. 0 ,57 )29. y = arctg(1, 05) . (DS. 0,81)30. y =(1, 03) 5 .(DS. 1, 15) 8.3 ... ta.idiˆe’m0, 51 ; t´u.cl`ay(0, 51 ).D˘a.t x0=0, 5; ∆x =0, 01. Khi d´o ta c´oarcsin(x0+∆x ≈ arcsinx0+ (arcsinx)x=x0∆x⇒ arcsin(0, 5+ 0, 01) ≈ arcsin0, 5 + (arcsinx)x=0 ,5 · 0, 01=π6+11...