যদি log10x = -1 হয়, তাহলে নিচের কোনটি x এর মান?
A
0.1
B
0.01
C
1/10000
D
0.001
উত্তরের বিবরণ
দেওয়া আছে, log10 x = -1 ⇒ 10-1 = x ⇒ x = 1/10⇒ x = 0.1
0
Updated: 1 month ago
Created: 3 weeks ago
A
25
B
5
C
9/5
D
125
প্রশ্ন: 
সমাধান:
log3[log2(log5a)] = 0
⇒ log2(log5a) = 30 [logbM = c ⇒ M = bc]
⇒ log2(log5a) = 1
⇒ log5a = 21
⇒ log5a = 2
⇒ a = 52
⇒ a = 25
∴ a = 25
0
Updated: 3 weeks ago
log10 0.01 = ?
Created: 2 months ago
A
2
B
- 2
C
- 1/2
D
0.02
প্রশ্ন: log10 0.01 = ?
সমাধান:
log10 0.01
= log10(1/100)
= log10(1/102)
= log10(10- 2)
= - 2 log1010
= (- 2) × 1 [ log1010 =1 ]
= - 2
0
Updated: 2 months ago
log10(10) + log10(100) + log10(1000) + log10(10000) = কত?
Created: 1 month ago
A
10
B
15
C
7
D
12
প্রশ্ন: log10(10) + log10(100) + log10(1000) + log10(10000) = কত?
সমাধান:
log10(10) + log10(100) + log10(1000) + log10(10000)
= log10(10) + log10(102) + log10(103) + log10(104)
= log10(10) + 2 × log10(10) + 3 × log10(10) + 4 × log10(10)
= 1 + 2 + 3 + 4 [যেহেতু, logaa = 1]
= 10
0
Updated: 1 month ago
