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Question-43072




Question Number 43072 by Raj Singh last updated on 07/Sep/18
Answered by tanmay.chaudhury50@gmail.com last updated on 07/Sep/18
3^(50) (3^(49) −1)  3^1 →unit term is 3  3^2 →unit term is9  3^3 →unit term is 7  3^4 →unit term is1  3^5 →unit term is 3    so sequence is 3 9 7 1   3 9 7 1  now  3^(50) (3^(49) −1)  (3^4 )^(12) ×3^2 {(3^4 )^(12) ×3−1}  unit term for 3^(48) →(3^4 )^(12)  is1  unit term of 3^(48) ×3^2 →9  unit term of (3^4 )^(12) ×3→3  unit term of (3^4 )^(12) ×3−1 →2  so unit term of  (3^4 )^(12) ×3^2 {(3^4 )^(12) ×3−1} is→8
350(3491)31unittermis332unittermis933unittermis734unittermis135unittermis3sosequenceis39713971now350(3491)(34)12×32{(34)12×31}unittermfor348(34)12is1unittermof348×329unittermof(34)12×33unittermof(34)12×312sounittermof(34)12×32{(34)12×31}is8

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