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`        The sum of infinity of the series 7/5²+10/5³+.............is please solve fully`
one year ago

Arun
24497 Points
```							S∞ = 7/5² + 10/5³ + .............................S∞/5 =         7/5³ + .......................-              -    -        -S∞(1-1/5) = 7/5² + 3/5³ + .............4S∞/5 =  7/ 52+ 3/5( 1/5² + .........................................)4S∞/5 = 7/ 5^2 + 3/5(1/5^2/(1-1/5))4S∞/5 = 7/25 + (3/5)(1/20)4S∞/5 = 31/100S∞ = 31/400
```
one year ago
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### Course Features

• 731 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions