Tolong lah ya saya lupa cara nya No 1,3 dan 4

Tolong lah ya saya lupa cara nya No 1,3 dan 4

Jawaban:

Penjelasan dengan langkah-langkah:

${7}^{4} times frac{1}{49} times {5}^{2} = {7}^{4} times frac{1}{ {7}^{2} } times {5}^{2} \ = {7}^{2} times {5}^{2} \ = {35}^{2} = 1225$

${2}^{ - 4} = frac{1}{ {2}^{4} } \ = frac{1}{16} \ = ( frac{1}{2} {)}^{4}$

${7}^{x + 8} = 49 \ {7}^{x + 8} = {7}^{2} \ x + 8 = 2 \ x = 2 - 8 \ x = - 6$