What is the remainder when (2^999)/7 If the remainder is R Then what is the value of A If A = R + R^2 +R^3 +.................R^n
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A very refreshing approach !!
still... yours is quite "BRILLIANT" !!!
i d i d i t l i k e t h i s : 2 3 ≡ 1 ( m o d 7 )
⇒ 2 9 9 9 ≡ 1 ( m o d 7 )
t h u s a s w e s e e , w e g e t 1 a s r e m a i n d e r . . . .
h e n c e ,
A = 1 + 1 + 1 . . . . . n t i m e s = 1 ∗ n = n
Remainder will be 1 so the value of A will be n.
@Anshul Sanghi how did you calculated the remainder??
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this can be done like ,
8^333 / 7
i.e
(7 + 1)^333 / 7
this is
(7 + 1)(7 + 1)(7 + 1)..............(7 + 1) / 7
now when u can treat 7 as x...
(x + 1)(x + 1)....................(x + 1) / x
now when u open it all the terms will be a multiple of x i.e 7 except the last term ie 1.
so the multiples of 7 will not leave any remainder and 1 will itself lead to a remainder 1....
hence R = 1
A = 1 + 1^2 ....... 1^n A = n