Someone help me with this pls

What is the rescursive formula for this geometric sequence? 7, -14, 28, -56

Which of the following describes the graph of y--4x-36 compared to the parent square root function? stretched by a factor of 2, reflected over the x-axis, and translated 9 units right stretched by a factor of 2, reflected over the x-axis, and translated 9 units left stretched by a factor of 2, reflected over the y-axis, and translated 9 units right stretched by a factor of 2, reflected over the y-axis, and translated 9 units left save and exit next submit

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.