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दो अंकों की वह कौन सी संख्या है जो व्यंजक `2^(12n)-6^(4n)` के इकाई तथा दहाई अंक से बनी है जहां `n` एक धनात्मक पूर्णांक है।
A. 10
B. 100
C. 30
D. 2

1 Answer

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Best answer
Correct Answer - B
`2^(12n)-6^(4n)`
`implies(2^(3))^(4n)-6^(4n)implies8^(4n)-6^(4n)`
`implies(8^(2))^(2n)-(6^(2))^(2n)`
`=64^(2n)-36^(2n)(n=1)`
`implies64^(2)-36^(2)`
`implies(64+36)(64-36)`
`implies100x28, implies100` Ans

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