Jawabanmu

2014-08-11T20:04:05+07:00
Dik t=3
r= (4t^2+3t)i + (6t+2t^2)j
turunan
= (4.2t^2-1+3.1t^1-1)i + (6.1t^1-1+2.2t^2-1)j
= (8t+3)i + (6+4t)j
= (8.3+3)i + (6+4.3)j
= 27i + 18j
thanks sob , btw ,gua salah ketik soal , ternyata soal : r =(4t^2+3t)i + (6t-2t^2)j
siah, ya tinggal ngrangin aja yg itu.