2 Answers

Yelena · Answer 1 · 2022-07-01T02:16:24+0000

✏️ Development:

⭐ Initially, we have to find the reason why it was -1.5:

$\large {\text {$ \sf f (n+1) = -2 f(n) $}}$

➡️ Having n, then we'll find the value of n, then we'll replace it with the found result.

$\large {\text {$ \sf f (x+1) = -2.x = -1,5 $}}$

⌛ So, we will have to find what x is worth in this case:

$\large {\text {$ \sf f ( 0,75 +1 ) = -2 \cdot 0,75 $}}$

$\large {\text {$ \sf f ( 0,75) = -1,5 $}}$

→ Knowing this...

$\large {\text {$ \sf f ( 1,5 + 1 ) = -2 \cdot 1,5 $}}$

$\large {\boxed {\boxed {\sf f ( 2,5 ) = -3 }}}$
$\checkmark$

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