Question Progress

Mathematics

1 answer:

solong [7]2 years ago

7 0

a_5=43
a_3=39

common difference=d=43-39=4

We need first term a

$\\ \sf{:}\dashrightarrow a_5=43$

$\\ \sf{:}\dashrightarrow a+4d=43$

$\\ \sf{:}\dashrightarrow a+4(4)=43$

$\\ \sf{:}\dashrightarrow a+16=43$

$\\ \sf{:}\dashrightarrow a=27$

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