Ciąg an jest geometryczny znajdź iloraz tego ciagu i a10 jeśli a9=0,28 a13=175.
a10=?
a9=0,28
a13=175
{a1*q8=0,28
{a1*q12=175
{a1=0,28/q8
{a1=175/q12
0,28/q8=175/q12
0,28*q12=175*q8
175=0,28q4
q4=625
q=5
a10=a9*q
a10=0,28*5
a10=1,4
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a10=?
a9=0,28
a13=175
{a1*q8=0,28
{a1*q12=175
{a1=0,28/q8
{a1=175/q12
0,28/q8=175/q12
0,28*q12=175*q8
175=0,28q4
q4=625
q=5
a10=a9*q
a10=0,28*5
a10=1,4