The common ratio of a geometric series is \dfrac14
4
1

start fraction, 1, divided by, 4, end fraction and the sum of the first 4 terms is 170

The first term is 128

Step-by-step explanation:

The common ratio of the geometric series is given as:

The sum of the first 4 term is 170.

The sum of first n terms of a geometric sequence is given b;

We put the common ratio, n=4 and equate to 170.

Simplify:

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1