1411 . a+b=7 এবং  a 2 + b 2 = 25   হ ল   5 a b     এ র   মান কত হবে

• A. 12
• B. 60
• C. 35
• D. কোনটি না

Answer: Option A

Explanation:

• A. 0.550000325
• B. 0.550000625
• C. 0.550000525
• D. 0.550000425

Answer: Option B

Explanation:

• A. 1
• B. 64
• C. 19
• D. 55

Answer: Option D

Explanation:

• A. -4 ≤ x ≤ 4
• B. -2 ≤ x ≤ 0
• C. 2 ≤ r ≤ 2
• D. -2 ≤ x ≤ 2

Answer: Option B

Explanation:

• A. 60
• B. 64
• C. 63
• D. 69

Answer: Option C

Explanation:

• A. $\sqrt{২}$
• B. $৪$
• C. $১$
• D. $২\sqrt{৩}$

Answer: Option B

Explanation:

• A. $10$
• B. $-10$
• C. $1$
• D. $-1$

Answer: Option D

Explanation:

• A. $20$
• B. $40$
• C. $60$
• D. $80$

Answer: Option B

Explanation:

• A. 144xy
• B. 12xy
• C. 6xy
• D. 24xy

Answer: Option D

Explanation:

• A. 1
• B. 2
• C. 3
• D. 4

Answer: Option D

Explanation:

• B. 1
• C. a-b
• D. a+b

Answer: Option B

Explanation:

• A. 4
• B. 3
• C. 2
• D. 1

Answer: Option D

Explanation:

• A. 4
• B. 5
• C. 6
• D. 7

Answer: Option A

Explanation:

• A. 2
• B. 1
• C. -2
• D. -1

Answer: Option B

Explanation:

• A. 0.1
• B. 0.01
• C. 0.001
• D. 0.0001

Answer: Option D

Explanation: