Geometric seq

Find the third member of geometric progression if a1 + a2 = 36 and a1 + a3 = 90. Calculate its quotient.

Correct answer:

c₁ =  81
c₂ =  373248
q₁ =  3
q₂ =  -0.5

Step-by-step explanation:

Our quadratic equation calculator calculates it.

$c_2=a_2\cdot a_2^2=72\cdot 72^2=373248$

$q_1=3$

$q_2=(-0.5)=-{\displaystyle \frac{1}{2}}=-0.5$

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