help please

Question

First: http://prntscr.com/87k7ch

Second: http://prntscr.com/87k6lu

Answer 1

(2)

The equation is .

Let .

Factorize the above equation.

and .

.

As exponential function can not be negative.

For any values of , above expression can not be negative.

Therefore, .

Answer 2

(1).

The equation is .

Rewrite the equation as .

Take natural logarithm on each side.

Power rule of logariths: .

Solution of the equation is .