7^(1+x)+7^(1-x)=50

7^(x+2)-(1)/(7)*7^(x+1)-14*7^(x-1)+2*7^(x)=48

Solve : 2^x + 2^(x-1) + 2^(x-2) = 7^x + 7^(x-1) + 7^(x-2)

If x,y,z in R , then the value of determinant |((5^(x)+5^(-x))^(2) , (5^(x)-5^(-x))^(2),1),((6^(x)+6^(-x))^(2),(6^(x)-6^(-x))^(2), 1),((7^(x)+7^(-x))^(2),(7^(x)-7^(-x))^(2),1)| is

If log_7^(1/2) x+ log_7^(1/3)x+ log_7^(1/4)x +.....20 times = 460 than x=?

Number of solutions of equation 2^(x)+2^(x-1)+2^(x-2)=7^(x)+7^(x-1)+7^(x-2) is

The Number of real roots of equation 2^x + 2^(x-1)+2^(x-2) =7^x + 7^(x-1)+7^(x-2) is

Number of real roots of the equation 2^x=2^(x-1)+2^(x-2)=7^x+7^(x-1)+7^(x-2) is (A) 4 (B) 2 (C) 1 (D) 0

Number of real roots of the equation 2^x+2^(x-1)+2^(x-2)=7^x+7^(x-1)+7^(x-2) is (A) 4 (B) 2 (C) 1 (D) 0