由1,3,5,.2n-1,.组成数列{an},数列{bn}满足b1=2,当n≥2时,bn=2a1n-1+3,则b5=
问题描述:
由1,3,5,.2n-1,.组成数列{an},数列{bn}满足b1=2,当n≥2时,bn=2a1n-1+3,则b5=
答
由1,3,5,.2n-1,.组成数列{an},数列{bn}满足b1=2,当n≥2时,bn=2a1n-1+3,则b5=
b1=2a11-1+3=2a10+3
b5=2a15-1+3=2a14+3=2(2*14-1)+3=27*2+3=57