Study Tools
Text Summarizer
Body Mass Calculator
SEO & Performance
SEO ROI Calculator
SEO Content Optimizer
Meta Description Checker
Sitemap Generator
Keyword Extractor
H1 Tag Checker
Image Alt Tag Checker
Practice & Prep
Notes Library
NCERT Solutions
Community & Insights
No results found.
Study Guides
Primary
NCERT Solutions by class
Notes & extras
Community & support
Account
Try one of these
Question
Answer: a=5,d=4 ⇒ a_n=4n+1 ⇒ a_20=81.