The fifth and eighth term of a G. P are 80 and 640 respectively. find the first term
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Find the power series expantion of f(z)=log(4=3z) at the point z=-1

Which statement is not always true for a parallelogram? (a) opposite sides are congruent. (b) diagonals bisect each other. (c) it has 4 congruent angles. (d) consecutive angles are supplementary.

Nine more than four times a number is the same as one less than twice the number. find the number?