1.

If 3 is the logarithm of 343, then the base is ..... (a) 5 (b) 7 (c) 6 (d) 9

Answer»

(b) 7

⇒ logx 343 = 3 ⇒ 343 = x3 

(.i.e.,) 73 = x3 ⇒ x = 7 

⇒ x = 7



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