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please solve this question ….…. posting question from 5 days

please solve this question ….…. posting question from 5 days
 

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Grade:12

1 Answers

Harsh Patodia IIT Roorkee
askIITians Faculty 907 Points
9 years ago
Hi Student

f(x)= 3x-1
\sum_{0}^{n-1}f(r) = 30 -1 + 31 -1 . . . . . . . 3n-1 -1 = (30 + 31 + 32…...+ 3n-1 ) – ( 1 + 1 + 1. . . . n times)\

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