$\begin{array}{l} s (x) = 2 x + 1 \\ t (x) = - 2 x^{2} + 1 \end{array}$
Find the value of $t (s (4))$

Answer

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Answer

So, the final answer is $- 161$ .

Steps

Step 1 ：First, we need to find the value of $s (4)$ by substituting $x = 4$ into the function $s (x) = 2 x + 1$ .

Step 2 ：So, $s (4) = 2 * 4 + 1 = 9$ .

Step 3 ：Then, we substitute the result into the function $t (x) = - 2 x^{2} + 1$ to find the value of $t (s (4))$ .

Step 4 ：Substituting $s (4) = 9$ into $t (x)$ , we get $t (9) = - 2 * 9^{2} + 1 = - 161$ .

Step 5 ：So, the final answer is $- 161$ .