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[ ( 243 )n/5 × 32n + 1 ]/[ 9n × 3n - 1 ] का मान क्या है ?
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- 3
- 9
- 6
- 12
सही विकल्प: B
[ ( 243 )n/5 × 32n + 1 ]/[ 9n × 3n - 1 ]
= [ ( 35 )n/5 × 32n + 1 ]/[ 32n × 3n - 1 ]
= [ ( 3 )n × 32n + 1 ]/[ 32n × 3n - 1 ]
= ( 3 )n + 2n + 1/( 3 )2n + n -1
= 33n + 1/( 3 )3n -1 = 3( 3n + 1 ) - ( 3n - 1 )
= 31 +1 = 32
⇒ 32 = 9
∴ [ ( 243 )n/5 × 32n + 1 ]/[ 9n × 3n - 1 ] = 9