let-I-n-0-dx-1-x-3-n-find-a-relation-etween-I-n-and-I-n-1-2-calculate-I-1-and-I-2- Tinku Tara June 4, 2023 Integration 0 Comments FacebookTweetPin Question Number 40159 by maxmathsup by imad last updated on 16/Jul/18 letIn=∫0∞dx(1+x3)nfindarelationetweenInandIn+12)calculateI1andI2 Commented by prof Abdo imad last updated on 17/Jul/18 1)wehaveIn=∫0∞1+x3(1+x3)n+1dx=In+1+∫0∞x3(1+x3)n+1dxbyparts∫0∞x3(1+x3)3dx=13∫0∞x(3x2(1+x3)n+1)dx=13∫0∞x(3x2(1+x3)−n−1)dx=13[−xn(1+x3)−n]0+∞−13∫0∞1(−1n)1(1+x3)ndx=13nIn⇒In=In+1+13nIn⇒(1−13n)In=In+1⇒In+1=3n−13nIn2)wehaveI1=∫0∞dx1+x3=x=t13∫0∞11+t13t13−1dt=13∫0∞t13−11+tdt=13πsin(π3)=π3.32=2π33I2=23I1=232π33=4π93. Terms of Service Privacy Policy Contact: info@tinkutara.com FacebookTweetPin Post navigation Previous Previous post: cos-2-5x-sin-2-7x-1-Next Next post: Question-171229 Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Save my name, email, and website in this browser for the next time I comment.