A
- 2
B
- 3
C
6
D
3
উত্তরের বিবরণ
সমাধান:
logx (1/27) = - 3
⇒ x- 3 = 1/27
⇒ x- 3 = 1/33
⇒ x- 3 = 3- 3
∴ x = 3
0
Updated: 1 day ago
log264 + log28 এর মান কত?
Created: 2 weeks ago
A
2
B
7
C
9
D
128
প্রশ্ন: log264 + log28 এর মান কত?
সমাধান:
log264 + log28
= log2(26) + log2(23)
= 6 log22 + 3 log22
= (6 × 1) + (3 × 1)
= 9
0
Updated: 2 weeks ago
loga(b4) = 4c এবং logb(a4)
= 4d হলে, cd = কত?
Created: 3 weeks ago
A
0
B
1
C
3
D
4
সমাধান:
loga(b4) = 4c
⇒ 4 × loga(b) = 4c [logn(mk) = k logn(m)]
⇒ loga(b) = c
আবার,
logb(a4) = 4d
⇒ 4 × logb(a) = 4d
⇒ logb(a) = d
∴ cd = loga(b) × logb(a)
⇒ cd = 1 ;[logn(m) × logm(n) = 1]
0
Updated: 3 weeks ago
log10 0.01 = ?
Created: 1 week 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: 1 week ago
