Question

plaese answer question no. 3​

Answer 1

Answer:

Step-by-step explanation:

√7-1/√7+1 – √7+1/√7-1

→ (√7-1)/(√7+1) × (√7-1)/(√7-1) – (√7+1)/(√7-1) × (√7+1)/(√7+1)

→ (√7-1)²/(√7+1)(√7-1) – (√7+1)²/(√7-1)(√7+1)

→ {√7²+1²-2(√7)(1)}/(√7²-1²) – {√7²+1²+2(√7)(1)}/(√7²-1²)

→ (7+1-2√7)/6 – (7+1+2√7)/6

→ (8-2√7)/6 – (8+2√7)/6

→ {8-2√7-8-2√7}/6

→ -4√7/6

→ 0+(-2/3)√7 = a+√7b

Therefore, a = 0 and b = -⅔

Answer 2

Here is your answer I hope it helps you