Question

please help me out in these sums and explain plz​

Answer 1

Step-by-step explanation:

13) Hence two irrational numbers are 0.510100100010000... and 0.5202002000200002... lying between 0.5 and 0.55.

14) Now,

2492 – 2482 = (249 + 248) (249 – 248)

[using identity,

a2 – b2 = (a – b)(a + b)] = 497 x 1 = 497.

Answer 2

Answer:

12. Step-by-step expl....

(3√5-2√5-√5) [(3√5)²(-2√5)²-(√5)²-(3√5×2√5)+(2√5×√5)-(√5×3√5)]

(3√5-2√5-√5) [45+20+5-30+10-15]

(3√5-2√5-√5) (70-35)

(3√5-2√5-√5) (35)

A:- 0

14.  Step-by-step expl....

(249)²-(248)²

(249+248) (249-248)

497 × 1

A:- 1

13 or 15 number ka sum nahi aata.