Question

Tìm x

7^2x+7^2x+2=2450

Answer 1

7^2x(1+ 49) = 2450

7^2x = 2450/50 = 49 = 7²

2x = 2

x = 1

Answer 2

không có x vì 7²⁺7²⁺²⁼2450

Answer 3

7^2x + 7^2x+2= 2450

1.7^2x + 7^2x+7²=2450

7^2x.(1+7²)=2450

7^2x.(1+49)=2450

7^2x.50 = 2450

7^2x=2450:50

7^2x=49

49=7²

2x=2

x=2:2

x=1