Question

关于微积分的数学题我不知道积分号怎么写,只能用f(t,0)表示了,即t到0的定积分,大家凑合看下a(t)=e^[f(t,

Answer 1

对的

∫0.1dr/(1+0.1r)dr

=∫d0.1r/(1+0.1r)dr

=∫d(1+0.1r)/(1+0.1r)dr

=ln(1+0.1r)(t到0)

=ln(1+0.1t)-ln1

=ln(1+0.1t)

所以a(t)=e^[ln(1+0.1t)]=1+0.1t