Question

plz answer my question.... open in the pic ​

Answer 1

Answer:

hope it's helpful to you

Answer 2

Step-by-step explanation:

${993}^{3} \\ = {(1000 - 7)}^{3} \\ = {1000}^{3} - {7}^{3} - 3 \times 1000 \times 7(1000 - 7) \\ = 1000000000 - 343 - 21000 \times 993 \\ = 1000000000 - 343 - 20853000 \\ = 1000000000 - 20853343 \\ = 979146657 \\ \\ = {1002}^{3} \\ = {(1000 + 2)}^{3} \\ = {1000}^{3} + {2}^{3} + 3 \times 1000 \times 2(1000 + 2) \\ =1000000000 + 8 + 6000(1002) \\ = 1000000008 + 6012000 \\ = 1006012008$

$t+1/t=8 cube both side we get \\</p><p>{(t+1/t)}^{3}=512 \\</p><p>{t}^{3}+{1/t}^{3}+3 \times t \times 1/t (t+1/t)=512 \\ {t}^{3}+{1/t}^{3}+3 \times 8=512 \\</p><p>{t}^{3}+{1/t}^{3}+24=512 \\</p><p>{t}^{3}+{1/t}^{3}=488$