Răspuns:
1. a) 2^19 × 2^21 = 2^19+21 = 2^40
b) 5^x × 5^x+1 = 5^x+x+1 = 5^2x+1
c) 3^2 ×3^3 × 3^7 = 3^2+3+7 = 3^12
2. a) 2^71÷2^32 = 2^71-32 =2^39
b) 7^18÷7^5÷7^6 = 7^18-5-6 = 7^7
c) 3^22÷3^3÷3^7 = 3^22-3-7 = 3^12
3. a) (5^4)^6 = 5^4×6 =5^24
b) [(3^2)^3]^4 = 3^2×3×4 = 3^ 24
4. a) (2×7)^14 = 2^14×7^14
b) 3^4×8^4×5^4=(3×8×5)^4
