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

Solve 7^(1+x)+7^(1-x)=50 for real x.

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

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

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

The range of the function f(x)=(x^2+x+2)/(x^2+x+1),x in R , is (1,oo) (b) (1,(11)/7) (c) (1,7/3) (d) (1,7/5)

The range of the function f(x)=(x^2+x+2)/(x^2+x+1),x in R , is (a) (1,oo) (b) (1,(11)/7) (c) (1,7/3) (d) (1,7/5)

int_(0)^(7)(sqrt(7-x))/(sqrt(x)+sqrt(7-x))dx = (a) 1 (b) (7)/(2) (c) 5 (d) 7

(7 ^ (2x + 3) + 7 ^ (2x + 1)) / (7 ^ (2x + 2) + 7 ^ (2x + 1))

int(5x^(8)+7x^(6))/(x^(2)+1+2x^(7))dx is equal to (a) (x)/(x^(2)+1+2x^(7))+C( b) (x^(7))/(x^(2)+1+2x^(7))+C (c) (x^(6))/(x^(2)+1+2x^(7))+C(d)x^(2)+1+2x^(7)+C