[tex] > resolucao \\ \\ \geqslant juros \: simples \\ \\ j = \frac{c \times i \times t}{100} \\ \\ j = \frac{1000 \times 7 \times 4}{100} \\ \\ j = 10 \times 7 \times 4 \\ \\ j = 280 \\ \\ resposta \: > \: \: 280.00 \: \: de \: \: juros \\ \\ = = = = = = = = = = = = = = = = = \\ \\ \\ \geqslant juros \: \: compostos \\ \\ m = c(1 + i) {}^{t} \\ m = 1000(1 + 0.07) {}^{4} \\ m = 1000(1.07) {}^{4} \\ m = 1000 \times 1.31079601 \\ m = 1310.80 \\ \\ \\ j = m - c \\ j = 1310.80 - 1000 \\ j = 310.80 \\ \\ \\ resposta \: > \: \: 310.80 \: \: de \: \: juros \\ \\ \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant \geqslant \geqslant [/tex]

Explicação passo-a-passo:

J=c.it

J=1.000x0,07x4

J=280,00