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A repunit is a number that contains only the digit 1, and the repunit of n digits is denoted by r(n)= 11111...1111 there are total n1 If f(x)= 90x 2 +20x 2 +1 then find the sum of digits of the number f(r(10))

A repunit is a number that contains only the digit 1, and the repunit of n digits is denoted by 

r(n)= 11111...1111   there are total n1

If f(x)=

90x2+20x2+1

 then find the sum of digits of the number f(r(10))

Grade:12th pass

4 Answers

Gman Namg
420 Points
8 years ago
i think 21
 
Gman Namg
420 Points
8 years ago
21
grenade
2061 Points
8 years ago
it will be 21
ng29
1698 Points
8 years ago
ANSWER WILL BE 21

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