4. The first two numbers in a sequence are 3, 9.

Mathematics

2 answers:

likoan [24]3 years ago

8 0

Answer:

234567

Step-by-step explanation:

gavmur [86]3 years ago

5 0

Answer:

AP equation:

$t_n=t_1+(n-1)d$

Based on the first two terms, we have:

$t_1=3,\\t_2=9\\d=9-3=6$

The equation is:

$t_n=3+(n-1)*6=3+6n-6=6n-3$

Next two terms are:

$t_3=6*3-3=15\\t_4=6*4-3=21$

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