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Mantissa is always…………..
a) positive                             
b) negative
c) both a and b                     
d) none of these

a

Rule No 1:

if x > 1, characteristic = (No. of digits on the left side of decimal point in x) – 1


Characteristic of log4350 is……….
a) 0     
b) 5                 
c) 3     
d) 4

c

Explanation:According to Rule no 1: x >1  then we count the digit on the left side of the decimal point in x like (4350.) mean 4 digits in the left of decimal. So 4 -1 =3



Characteristic of log435 is……….
a) 2      
b) 5                  
c) 3      
d) 4

a

Explanation:According to Rule no 1: x >1  then we count the digit on the left side of the decimal point in x like (435.) mean 3digits in the left of decimal. So 3 -1 =2



Characteristic of log43.5 is……….
a) 0      
b) 1                  
c) 3      
d) 4

b

Explanation:According to Rule no 1: x >1  then we count the digit on the left side of the decimal point in x like (43.5mean 2digits in the left of decimal. So 2 -1= 1



Characteristic of log4.35 is……….
a) 0      
b) 1                  
c) 3      
d) 4

a

Explanation:According to Rule no 1: x >1  then we count the digit on the left side of the decimal point in x like (4.35mean 1digits in the left of decimal. So 1 -1= 0