A
8
B
2
C
15
D
10
উত্তরের বিবরণ
প্রশ্ন:
সমাধান:
2log23 + log25
= 2log2(3 × 5)
= 2log215
= 15
[ সূত্রঃ alogab = b ]
0
Updated: 16 hours ago
logx(1/8) = - 2 হলে, x = কত?
Created: 1 week ago
A
2
B
√2
C
2√2
D
4
প্রশ্ন: logx(1/8) = - 2 হলে, x = কত?
সমাধান:
logx(1/8) = - 2
⇒ x- 2 = 1/8
⇒ 1/x2 = 1/8
⇒ x2 = (2√2)2
⇒ x = 2√2
0
Updated: 1 week ago
5log105 - log1025 = কত?
Created: 1 week ago
A
log10 75
B
log10 25
C
log1015
D
log10125
প্রশ্ন: 5log105 - log1025 = কত?
সমাধান:
= 5log105 - log1025
= 5log105 - log1052
= 5log105 - 2log105
= 3log105
= log1053
= log10125
0
Updated: 1 week ago
logx1/9 = -2 হলে, x এর মান কোনটি?
Created: 1 day ago
A
3
B
2
C
1/3
D
-1/3
প্রশ্ন: logx1/9 = - 2 হলে, x এর মান কোনটি?
সমাধান:
logx1/9 = - 2
⇒ x-2 = 1/9
⇒ 1/x2 = 1/32
⇒ x2 = 32
∴ x = 3
0
Updated: 1 day ago
