Question

2.3.4 si 1.2.3.4 va rogg Dau Coroana e urgent pt maine​

Answer 1

2. 10

3.14× 15¹⁴

4.13¹²

1. 7^x+7^x+1= 7^x(1+7¹)

7^x * 8 = 2³ *7²⁰¹⁶

2³=8 , deci x=2016

2. 3⁶⁵:3^x=3²¹

3^65-x = 3²¹

65-x=21

x=65-21=44

3. 2+6+10+...+30=2* x³

2+(2+4)+(2+4+4)+...+(2+4×7)

2×8+4(1+2+...7)

2×8+ 4* 7*8/2=16+16*7= 16×8= 4²*2³=2⁴×2³=2⁷

2⁷=2*x³

2* 2⁶=2*x³

2⁶=x³

(2²)³=x³

x=4 (B)

4.3⁸-3⁶=3⁶(3²-1)=3⁶*8=3⁶*2³= ((3×2)³)²=(6³)²=(6²)³=36³ (nu stiu daca punctul acesta este bun)